Patent US3683203A successfully refreshed from Google Patents.
US3683203A
Expired / Lapsed
US
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Electronic shift register system
Assignee: Arris Technology Inc
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Filing: 1969-09-08
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Granted: 1972-08-08
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Expires: 1989-09-08
Abstract
Abstract A controlled, regenerative, feedback is utilized to connect the output potential of a data input transfer stage of a shift register circuit to the control terminal of an output transfer stage of a preceeding shift register circuit that is connected therewith in series. The feedback permits control by expanded pulses of indefinite time length and any polarity, thereby greatly increasing the usefulness of such shift registers. With this arrangement the manufacture and use of identical, singlestage circuit modules that may be connected in series for greater flexibility in designing electronic shift register systems is greatly simplified.
Inventors
- 👤 Kent F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:03
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/18; G11C19/182; G11C19/184
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
373 words
In a shift register system comprising a plurality of bits, each bit having an input port and an output port, a given bit having its input port connected to the output port of a previous bit and its output port connected to the input port of a subsequent bit, each bit comprising first and second transfer stages, each transfer stage having an input and an output and adapted to have a different output signal depending upon the input signal thereto, first means for shifting a data signal at said bit input port to said input of said first transfer stage, second means for shifting a data signal at said output of said first transfer stage to said input of said second transfer stage, said bit output port being operatively connected to said output port of said second transfer stage, cyclical control means operatively connected to said shift register system for causing a given data signal at said bit input port to be transferred from said bit input port to said bit output port via said first and second transfer stages, said cyclical control means comprising means for providing first and second alternately operative control signals operatively connected to said first and second shifting means respectively and effective to cause their associated shifting means respectively to effect their respective signal shifts, said first control signal thereby being effective to transfer said data signal from said bit input port to said first stage and said second control signal being effective to transfer said data signal from said first stage to said second stage, first latching means operatively connected between the output of said second stage and the input of said first stage effective to retain said stages in a condition corresponding to the data signal at said bit output port between cycles of said control means, the improvement comprising second latching means operatively connected between the output of said first transfer stage of a given bit and the input of the second transfer stage of the previous bit effective to retain said second transfer stages in a condition determined by the data output signal at the bit output port of said previous stage between cycles of said control means, and to insure unidirectional informational flow.
Claim 2
Dependent Claim
373 words
In a shift register system comprising a plurality of bits, each bit having an input port and an output port, a given bit having its input port connected to the output port of a previous bit and its output port connected to the input port of a subsequent bit, each bit comprising first and second transfer stages, each transfer stage having an input and an output and adapted to have a different output signal depending upon the input signal thereto, first means for shifting a data signal at said bit input port to said input of said first transfer stage, second means for shifting a data signal at said output of said first transfer stage to said input of said second transfer stage, said bit output port being operatively connected to said output port of said second transfer stage, cyclical control means operatively connected to said shift register system for causing a given data signal at said bit input port to be transferred from said bit input port to said bit output port via said first and second transfer stages, said cyclical control means comprising means for providing first and second alternately operative control signals operatively connected to said first and second shifting means respectively and effective to cause their associated shifting means respectively to effect their respective signal shifts, said first control signal thereby being effective to transfer said data signal from said bit input port to said first stage and said second control signal being effective to transfer said data signal from said first stage to said second stage, first latching means operatively connected between the output of said second stage and the input of said first stage effective to retain said stages in a condition corresponding to the data signal at said bit output port between cycles of said control means, the improvement comprising second latching means operatively connected between the output of said first transfer stage of a given bit and the input of the second transfer stage of the previous bit effective to retain said second transfer stages in a condition determined by the data output signal at the bit output port of said previous stage between cycles of said control means, and to insure unidirectional informational flow.
Claim 3
Dependent Claim
26 words
The shift register system of claim 1, in which said second control signal is operatively connected to and is effective to actuate said first latching means.
Claim 4
Dependent Claim
26 words
The shift register system of claim 1, in which said first control signal is operatively connected to and is effective to actuate said second latching means.
Claim 5
Dependent Claim
244 words
In a shift register system comprising a system input port, first, second and third transfer stages each having an input and an output and each adapted to have a different output signal depending upon the input signal thereto, a first electronic switch connected between said syStem input port and the input of said first stage, a second electronic switch connected between the output of said first stage and the input of said second stage, a third electronic switch connected between the output of said second stage and the input of said third stage, a system output port, means connecting the output of said third stage to said system output port, control means active on said switches for causing them to become conductive at predetermined times, first feedback means operative between the output of said second stage and the input of said first stage during at least a portion of the time that said first switch is nonconductive and effective to cause said first stage to assume a condition related to that of said second stage in a predetermined manner; the improvement which comprises a second feedback means operative between the output of said third stage and the input of said second stage during at least a portion of the time that said second switch is nonconductive and effective to cause said second stage to assume a condition related to that of said third stage in a predetermined manner, and to insure unidirectional informational flow.
Claim 6
Dependent Claim
244 words
In a shift register system comprising a system input port, first, second and third transfer stages each having an input and an output and each adapted to have a different output signal depending upon the input signal thereto, a first electronic switch connected between said syStem input port and the input of said first stage, a second electronic switch connected between the output of said first stage and the input of said second stage, a third electronic switch connected between the output of said second stage and the input of said third stage, a system output port, means connecting the output of said third stage to said system output port, control means active on said switches for causing them to become conductive at predetermined times, first feedback means operative between the output of said second stage and the input of said first stage during at least a portion of the time that said first switch is nonconductive and effective to cause said first stage to assume a condition related to that of said second stage in a predetermined manner; the improvement which comprises a second feedback means operative between the output of said third stage and the input of said second stage during at least a portion of the time that said second switch is nonconductive and effective to cause said second stage to assume a condition related to that of said third stage in a predetermined manner, and to insure unidirectional informational flow.
Claim 7
Dependent Claim
44 words
The system of claim 4, in which said control means is active to cause said first and third switches to be conductive together over a first period of time and to cause said second switch to be conductive over a second period of time.
Claim 8
Dependent Claim
45 words
The system of claim 4, in which said second feedback means includes an additional electronic switch connected between the corresponding input and output, said control means being active on said additional switch to render it conductive during said operative time of said second feedback means.
Claim 9
Dependent Claim
243 words
A shift register system comprising at least three transfer stages each having an input port and an output port, a given stage having its input port connected to the output port of a previous stage and its output port connected to the input port of a subsequent stage, each transfer stage comprising first and second electronic switch means, a reference voltage source, each of said switch means having two output circuit terminals and a control terminal, the output circuit terminals of said first switch means being connected between said input port and the control terminal of said second switch means, the output circuit terminals of said second switch means being connected between said reference voltage source and ground, said output port being connected to the reference voltage side of said second switch means, a control voltage source connected to the control terminal of said first switch means whereby a data signal is transferred from said input port to said output port by the operative effect of said control voltage source, the improvement which comprises a plurality of feedback means operatively connected, respectively, between said output port of each transfer stage and the control terminal of said second switch means of the previous transfer stage thereby to condition said second switch means of said previous stage to be conductive or nonconductive depending upon the nature of the data signal at the output port of the immediately following stage, and to insure unidirectional informational flow.
Claim 10
Dependent Claim
243 words
A shift register system comprising at least three transfer stages each having an input port and an output port, a given stage having its input port connected to the output port of a previous stage and its output port connected to the input port of a subsequent stage, each transfer stage comprising first and second electronic switch means, a reference voltage source, each of said switch means having two output circuit terminals and a control terminal, the output circuit terminals of said first switch means being connected between said input port and the control terminal of said second switch means, the output circuit terminals of said second switch means being connected between said reference voltage source and ground, said output port being connected to the reference voltage side of said second switch means, a control voltage source connected to the control terminal of said first switch means whereby a data signal is transferred from said input port to said output port by the operative effect of said control voltage source, the improvement which comprises a plurality of feedback means operatively connected, respectively, between said output port of each transfer stage and the control terminal of said second switch means of the previous transfer stage thereby to condition said second switch means of said previous stage to be conductive or nonconductive depending upon the nature of the data signal at the output port of the immediately following stage, and to insure unidirectional informational flow.
Claim 11
Dependent Claim
84 words
The shift register system of claim 7, in which said feedback means each comprises a third electronic switch means having output circuit terminals and a control terminal, said output circuit terminals of said third switch means being connected between said output port of each transfer stage and said control terminal of said second switch means of said previous stage, said control voltage source being operatively connected to the control terminal of said third switch means and effective to render said third switch means conductive.
Claim 12
Dependent Claim
33 words
The shift register system of claim 8, wherein the control terminals of successive first switch means are connected respectively to first and second control voltage sources comprising first and second non-overlapping clock pulses.
Claim 13
Dependent Claim
51 words
The shift register system of claim 7, further comprising fourth switch means having a control terminal and two output circuit terminals, said output circuit terminals being connected between said reference voltage source and said output port, said control terminal of said fourth switch means being connected to said reference voltage source.
Claim 14
Dependent Claim
51 words
The shift register system of claim 8, further comprising fourth switch means having a control terminal and two output circuit terminals, said output circuit terminals being connected between said reference voltage source and said output port, said control terminal of said fourth switch means being connected to said reference voltage source.
Claim 15
Dependent Claim
51 words
The shift register system of claim 9, further comprising fourth switch means having a control terminal and two output circuit terminals, said output circuit terminals being connected between said reference voltage source and said output port, said control terminal of said fourth switch means being connected to said reference voltage source.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |