US3745367A
Expired / Lapsed
US
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Method and apparatus for generating timing pulses with varying distances
Assignee: International Business Machines Corp
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Filing: 1972-05-02
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Granted: 1973-07-10
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Expires: 1992-05-02
Abstract
Abstract A timing pulse generator producing periodic pulse sequences with the distances between successive pulses in each sequence varying according to a periodically varying voltage employed as the upper voltage limit to which a charging capacitor is charged. A bistable switch is responsive to the charging capacitor reaching the upper voltage limit to effect both a change in level in its output voltage and discharge of the capacitor to a lower voltage limit. Upon the charging capacitor reaching the lower voltage limit the bistable switch is again responsive to effect both a change in level in its output voltage back to its original level and the charging of the capacitor.
Inventors
- 👤 H Schindler
- 👤 P Vettiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:08
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K3/00; H03K3/78
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
170 words
A timing pulse generator for generating pulses having distances therebetween which vary according to a pre-selected function, comprising: charge storage means; means coupled to said charge storage means to charge said charge storage means in response to a first control signal and discharge said charge storage means in response to a second control signal; compare circuit means coupled to said charge storage means to provide a first output signal when said charge storage means charges to a first voltage level and to provide a second output signal when said charge storage means discharges to a second voltage level; and switching circuit means coupling the first and second output signal of said compare circuit means to said means to charge so that the said first output signal of said compare circuit means initiates production of said second control signal and the said second output signal of said compare circuit means initiates production of said first control signal, whereby pulses are generated having distances therebetween which vary according to said pre-selected function.
Claim 2
Dependent Claim
170 words
A timing pulse generator for generating pulses having distances therebetween which vary according to a pre-selected function, comprising: charge storage means; means coupled to said charge storage means to charge said charge storage means in response to a first control signal and discharge said charge storage means in response to a second control signal; compare circuit means coupled to said charge storage means to provide a first output signal when said charge storage means charges to a first voltage level and to provide a second output signal when said charge storage means discharges to a second voltage level; and switching circuit means coupling the first and second output signal of said compare circuit means to said means to charge so that the said first output signal of said compare circuit means initiates production of said second control signal and the said second output signal of said compare circuit means initiates production of said first control signal, whereby pulses are generated having distances therebetween which vary according to said pre-selected function.
Claim 3
Dependent Claim
18 words
The timing pulse generator as set forth in claim 1 wherein said first voltage level varies with time.
Claim 4
Dependent Claim
22 words
The timing pulse generator as set forth in claim 2 wherein said first voltage level varies periodically according to said pre-selected function.
Claim 5
Dependent Claim
17 words
The timing pulse generator as set forth in claim 3 wherein said second voltage level is constant.
Claim 6
Dependent Claim
35 words
The timing pulse generator as set forth in claim 4 wherein the period of said pre-selected function is initiated by regularly spaced clock pulses which act to initiate a sampling interval corresponding to said period.
Claim 7
Dependent Claim
42 words
The timing pulse generator as set forth in claim 5 wherein switch means coupled to said charge storage means are responsive to the said clock pulses which initiate said sampling interval to discharge said charge storage means to said constant voltage level.
Claim 8
Dependent Claim
23 words
The timing pulse generator as set forth in claim 6 wherein said first voltage level varies periodically according to a sawtooth waveform functIon.
Claim 9
Independent Claim
190 words
A method of generating timing pulses in periodic sequences with the distance between successive pulses in each sequence varying according to a pre-selected function, comprising the steps of: causing a capacitor to charge toward a first voltage level in response to a first control indication produced each time said capacitor reaches a second voltage level and causing said capacitor to discharge toward said second voltage level in response to a second control indication produced each time said capacitor reaches said first voltage level, with said first voltage level periodically varying with time according to said function; comparing the voltage on said capacitor with said first voltage level to produce a first signal when the voltage on said capacitor charges to said first voltage level and comparing the voltage on said capacitor with said second voltage level to produce a second signal when the voltage on said capacitor charges to said second voltage level; and producing said first control indication in response to said second signal and said second control indication in response to said first signal, whereby said first and second control indications define the pulses in said periodic sequences.
Claim 10
Independent Claim
190 words
A method of generating timing pulses in periodic sequences with the distance between successive pulses in each sequence varying according to a pre-selected function, comprising the steps of: causing a capacitor to charge toward a first voltage level in response to a first control indication produced each time said capacitor reaches a second voltage level and causing said capacitor to discharge toward said second voltage level in response to a second control indication produced each time said capacitor reaches said first voltage level, with said first voltage level periodically varying with time according to said function; comparing the voltage on said capacitor with said first voltage level to produce a first signal when the voltage on said capacitor charges to said first voltage level and comparing the voltage on said capacitor with said second voltage level to produce a second signal when the voltage on said capacitor charges to said second voltage level; and producing said first control indication in response to said second signal and said second control indication in response to said first signal, whereby said first and second control indications define the pulses in said periodic sequences.
Claim 11
Dependent Claim
15 words
The method as set forth in claim 8 wherein said second voltage level is constant.
Claim 12
Dependent Claim
27 words
The method as set forth in claim 9 wherein the period of said pre-selected function is initiated in accordance with the occurrence of regularly spaced clock pulses.
Claim 13
Dependent Claim
20 words
The method as set forth in claim 10 wherein said first voltage level periodically varies to form a sawtooth waveform.
Claim 14
Dependent Claim
29 words
The method as set forth in claim 11 including the further step of causing said capacitor to discharge to said constant voltage level each time a clock pulse occurs.
Claim 15
Dependent Claim
322 words
A timing pulse generator for generating timing pulses in periodic sequences with the distance between successive pulses in each sequence varying according to a pre-selected function, comprising: capacitor charge storage means; means coupled to said capacitor charge storage means to charge said capacitor charge storage means in response to a first control signal and to discharge said capacitor charge storage means in response to a second control signal; first and second reference voltage means with the amplitude of the voltage of said first reference voltage means periodically varying with time and with the amplitude of the voltage of said second reference voltage means being constant with time; compare circuit means coupled to said capacitor charge storage means and to said first and second reference voltage means for comparing the voltage level on said capacitor charge storage means with the amplitude of the respective reference voltages of said first and second reference voltage means so as to produce a first output signal therefrom when the voltage level on said capacitor charge storage means reaches the said amplitude of the voltage of said first reference voltage means and to produce a second output signal therefrom when the voltage level on said capacitor charge storage means reaches the said amplitude of the voltage of said second reference voltage means; and bistable switching circuit means coupled between said compare circuit means and said means to charge said capacitor charge storage means so as to produce the said first control signal in response to the said second output signal from said compare circuit means and to produce the said second control signal in response to the said first output signal from said compare circuit means, whereby said bistable switching circuit means acts to produce the said timing pulses in said periodic sequences with the distance between successive pulses in each sequence varying according to the manner in which said first reference voltage means periodically varies with time.
Claim 16
Dependent Claim
322 words
A timing pulse generator for generating timing pulses in periodic sequences with the distance between successive pulses in each sequence varying according to a pre-selected function, comprising: capacitor charge storage means; means coupled to said capacitor charge storage means to charge said capacitor charge storage means in response to a first control signal and to discharge said capacitor charge storage means in response to a second control signal; first and second reference voltage means with the amplitude of the voltage of said first reference voltage means periodically varying with time and with the amplitude of the voltage of said second reference voltage means being constant with time; compare circuit means coupled to said capacitor charge storage means and to said first and second reference voltage means for comparing the voltage level on said capacitor charge storage means with the amplitude of the respective reference voltages of said first and second reference voltage means so as to produce a first output signal therefrom when the voltage level on said capacitor charge storage means reaches the said amplitude of the voltage of said first reference voltage means and to produce a second output signal therefrom when the voltage level on said capacitor charge storage means reaches the said amplitude of the voltage of said second reference voltage means; and bistable switching circuit means coupled between said compare circuit means and said means to charge said capacitor charge storage means so as to produce the said first control signal in response to the said second output signal from said compare circuit means and to produce the said second control signal in response to the said first output signal from said compare circuit means, whereby said bistable switching circuit means acts to produce the said timing pulses in said periodic sequences with the distance between successive pulses in each sequence varying according to the manner in which said first reference voltage means periodically varies with time.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |