Patent US5010412A successfully refreshed from Google Patents.
Patent US5534805A successfully refreshed from Google Patents.
← Back to Patent Explorer
US5534805A Expired / Lapsed US ⏱️ 0.0 years remaining

Synchronized clock generating apparatus

Assignee: Renesas Electronics Corp
•
Filing: 1995-05-24
•
Granted: 1996-07-09
•
Expires: 2015-05-24
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A synchronized clock generating apparatus includes a delayed clock generating circuit including a plurality of serially connected delaying elements for generating delayed clock signals delayed successively to an incoming basic clock signal. A plurality of storage elements store therein a predetermined level in response to transitions occurring in associated ones of the basic and delayed clock signals after an asynchronous trigger signal is applied thereto. A clock selection logic circuit is controlled by the output signal from the storage elements for detecting the clock signal transition occurring closest in time to the application of the asynchronous trigger signal, and for selecting a desired one of the clock signals based on the result of the detection, as a synchronized clock input signal.

Inventors

  • 👤 Yukio Miyazaki
  • 👤 Takenori Okitaka
  • 👤 Makoto Hatakenaka
  • 👤 Junji Mano

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 18:16
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/02; H04L7/033; H04L7/0337; H04L7/0338; G; G06; G06F; G06F1/00; G06F1/04; G06F1/10; H03; H03K; H03K5/00; H03K5/13; H03K5/133; H03K2005/00013; H03K2005/0015; H03K2005/00234

Claims Analysis

Total Claims: 24
Claim 1
Independent Claim 291 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a selected one of said delayed clock signals to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 2
Dependent Claim 291 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a selected one of said delayed clock signals to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 3
Dependent Claim 59 words
A synchronized clock generating apparatus according to claim 1, further comprising a plurality of inhibit paths for connecting said feedback outputs to said disabling input for inhibiting from being transmitted to said delaying elements any of said delayed clock signals succeeding said selected one of said delayed clock signals and wherein said plurality of delay elements have disabling inputs.
Claim 4
Dependent Claim 304 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a first one of said delayed clock signals having a transition after a transition of said trigger signal to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 5
Dependent Claim 304 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a first one of said delayed clock signals having a transition after a transition of said trigger signal to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 6
Dependent Claim 328 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition succeeding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 7
Dependent Claim 328 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition succeeding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 8
Dependent Claim 59 words
A synchronized clock generating apparatus according to claim 4, further comprising a plurality of inhibit paths for connecting said feedback outputs to said disabling input to inhibit from being transmitted to said delaying elements any of said delayed clock signals succeeding said selected one of said delayed clock signals and wherein said plurality of delay elements have disabling inputs.
Claim 9
Dependent Claim 328 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition preceding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 10
Dependent Claim 328 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition preceding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 11
Dependent Claim 59 words
A synchronized clock generating apparatus according to claim 6, further comprising a plurality of inhibit paths for connecting said feedback outputs to said disabling input for inhibiting from being transmitted to said delaying elements any of said delayed clock signals succeeding said selected one of said delayed clock signals and wherein said plurality of delay elements have disabling inputs.
Claim 12
Dependent Claim 336 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to one of said flip-flop output signals switching to said reset state and another one of said flip-flop outputs, preceding said one of said flip-flop output signals, being in said set state; said selected one of said delayed clock signals having a transition with a predetermined relationship to a said one of said delayed clock signals; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 13
Dependent Claim 336 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to one of said flip-flop output signals switching to said reset state and another one of said flip-flop outputs, preceding said one of said flip-flop output signals, being in said set state; said selected one of said delayed clock signals having a transition with a predetermined relationship to a said one of said delayed clock signals; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 14
Dependent Claim 59 words
A synchronized clock generating apparatus according to claim 8 further comprising a plurality of inhibit paths for connecting said feedback outputs to said disabling input for inhibiting from being transmitted to said delaying elements any of said delayed clock signals succeeding said selected one of said delayed clock signals and wherein said plurality of delay elements have disabling inputs.
Claim 15
Dependent Claim 354 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to one of said flip-flop output signals switching to said reset state and another one of said flip-flop outputs, preceding said one of said flip-flop output signals, being in said set state; said selected one of said delayed clock signals having a transition with a predetermined relationship to a said one of said delayed clock signals; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 16
Dependent Claim 354 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to one of said flip-flop output signals switching to said reset state and another one of said flip-flop outputs, preceding said one of said flip-flop output signals, being in said set state; said selected one of said delayed clock signals having a transition with a predetermined relationship to a said one of said delayed clock signals; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 17
Dependent Claim 312 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit, said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a selected one of said delayed clock signals to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 18
Dependent Claim 312 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit, said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a selected one of said delayed clock signals to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 19
Dependent Claim 323 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each one of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a first one of said delayed clock signals having a transition after a transition of said trigger signal to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 20
Dependent Claim 323 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each one of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying a first one of said delayed clock signals having a transition after a transition of said trigger signal to said selected clock output and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 21
Dependent Claim 347 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each one of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition succeeding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 22
Dependent Claim 347 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each one of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition succeeding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 23
Dependent Claim 347 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each one of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition preceding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.
Claim 24
Dependent Claim 347 words
A synchronized clock generating apparatus comprising: a delayed clock generating circuit; said delayed clock generating circuit including a clock input having a basic clock signal applied thereto; said delayed clock generating circuit including further a plurality of delaying elements connected in series; each one of said plurality of delaying elements of said delayed clock generating circuit being a semiconductor logic element; said plurality of delaying elements being effective for producing a plurality of delayed clock signals each successively delayed relative to said basic clock signal; a plurality of flip-flops, each having a respective one of said plurality of delayed clock signals applied to a first input thereof; said plurality of flip-flops each having a second input with a trigger signal, asynchronous with said basic clock signal, applied thereto; each of said plurality of flip-flops having a third input and a flip-flop output; said plurality of flip-flops receiving said trigger signal and said delayed clock signals such that each flip-flop, of said plurality of flip-flops, switches a flip-flop output signal at said flip-flop output thereof to a reset state from a set state in response to receiving a transition of said respective one of said delayed clock signals after a transition of said trigger signal; a clock selection circuit having a first plurality of inputs receiving said delayed clock signals, each of a second plurality of inputs receiving a respective one of said flip-flop output signals, a plurality of feedback outputs, and a selected clock output; said clock selection circuit applying to said selected clock output a selected one of said delayed clock signals and a feedback signal to a selected feedback output of said feedback outputs in response to a first one of said flip-flop output signals switching to said reset state; said selected one of said delayed clock signals having a transition preceding a first one of said delayed clock signals having a transition after a transition of said trigger signal, by a predetermined period; and feedback means for connecting said feedback outputs to said third input of respective ones of said plurality of flip flops.

References Cited (Backward Citations)

JPS6341466A Cited
US4851710A Cited
JPH01320482A Cited
US4973860A Cited
US5086236A Cited
US5252867A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1999-07-09 2000-01-08 2000-07-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2003-07-09 2004-01-08 2004-07-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2007-07-09 2008-01-08 2008-07-09 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag