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US3820029A
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Precision voltage control monostable multivibrator
Assignee: Halliburton Co
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Filing: 1973-05-15
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Granted: 1974-06-25
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Expires: 1993-05-15
Abstract
Abstract A circuit for providing, when triggered, an output pulse of substantially constant amplitude and a duration linearly variable from zero to a predetermined maximum as a function of the amplitude of a control voltage variable from zero to a predetermined maximum. In the preferred embodiment, means are provided to produce a negative pulse of predetermined duration and a longer pulse having a duration equal to the sum of the predetermined duration and a duration related to the value of a control voltage. The two pulses are algebraically summed to provide an output pulse having a duration equal to the difference in duration and thus related solely in duration to the value of the control voltage.
Inventors
- 👤 Kinley R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:29
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
176 words
A circuit for providing a pulse selectively variable from zero to a predetermined maximum comprising: means responsive to a trigger signal for providing a first signal having a substantially constant amplitude and a predetermined duration; means responsive to a trigger signal and to a control signal for providing a second signal having a substantially constant amplitude and having a duration related to the sum of said predetermined duration and a duration related to the value of the control signal; first circuit means for simultaneously applying a trigger signal to said first signal providing means and to said second signal providing means; second circuit means for applying a control signal to said second signal providing means, said control signal being selectively variable in value from zero to a predetermined maximum; and, means responsive to said first signal providing means and to said second signal providing means for providing an output signal having a substantially constant amplitude and a duration variable from zero to a predetermined maximum as a sole function of the value of said control signal.
Claim 2
Dependent Claim
176 words
A circuit for providing a pulse selectively variable from zero to a predetermined maximum comprising: means responsive to a trigger signal for providing a first signal having a substantially constant amplitude and a predetermined duration; means responsive to a trigger signal and to a control signal for providing a second signal having a substantially constant amplitude and having a duration related to the sum of said predetermined duration and a duration related to the value of the control signal; first circuit means for simultaneously applying a trigger signal to said first signal providing means and to said second signal providing means; second circuit means for applying a control signal to said second signal providing means, said control signal being selectively variable in value from zero to a predetermined maximum; and, means responsive to said first signal providing means and to said second signal providing means for providing an output signal having a substantially constant amplitude and a duration variable from zero to a predetermined maximum as a sole function of the value of said control signal.
Claim 3
Dependent Claim
89 words
The circuit of claim 1 wherein the value of said control signal is voltage; and, wherein said second signal providing means includes: a source of substantially constant current, means for integrating current from said source to provide a voltage increasing at a substantially linear rate from zero, binary means responsive to a trigger signal for operatively connecting said source to said integrating means when in a first condition, and comparing means responsive to said control voltage and to said variable voltage for changing the condition of said binary means.
Claim 4
Dependent Claim
138 words
A monostable multivibrator for producing a pulse variable in duration from zero to a predetermined value as a function of a control signal comprising: means for providing a control signal; means responsive to a trigger signal and to said control signal providing means for providing a first pulse having a duration not less than a predetermined value and related to the value of the control signal; means responsive to a trigger signal for providing a second pulse commencing concurrently with the commencement of said first pulse and having a duration less than that of said first pulse and related to said predetermined value; and, means responsive to said first and second pulses for providing a third pulse having a duration related to the difference in the duration of said first pulse and the duration of said second pulse.
Claim 5
Dependent Claim
138 words
A monostable multivibrator for producing a pulse variable in duration from zero to a predetermined value as a function of a control signal comprising: means for providing a control signal; means responsive to a trigger signal and to said control signal providing means for providing a first pulse having a duration not less than a predetermined value and related to the value of the control signal; means responsive to a trigger signal for providing a second pulse commencing concurrently with the commencement of said first pulse and having a duration less than that of said first pulse and related to said predetermined value; and, means responsive to said first and second pulses for providing a third pulse having a duration related to the difference in the duration of said first pulse and the duration of said second pulse.
Claim 6
Dependent Claim
52 words
The monostable multivibrator of claim 3 wherein said first pulse providing means includes a monostable multivibrator; and, wherein said second pulse providing means includes a ramp generator and a comparator, said ramp generator being responsive to said trigger signal, said comparator being responsive to said ramp generator and to said control signal.
Claim 7
Dependent Claim
46 words
The monostable multivibrator of claim 4 including means for biasing said comparator to provide an output signal equal to said predetermined value in the presence of a control signal having zero value, said predetermined minimum being not less than the minimum operating limit of said comparator.
Claim 8
Independent Claim
128 words
A method for providing a pulse having a duration selectively variable linearly from zero to a predetermined value comprising the steps of: a. providing a control signal having a predetermined minimum value; b. initiating a first signal variable in duration from a predetermined minimum value to a value related to the sum of the predetermined minimum value and the value of the control voltage; c. initiating a second signal concurrently with the initiation of the first signal, the second signal having a duration related to the predetermined minimum value; and, d. providing an output signal related to the difference in duration of the first and second signals, the output signal being thereby variable in duration from zero to a value related to the value of the control signal.
Claim 9
Independent Claim
128 words
A method for providing a pulse having a duration selectively variable linearly from zero to a predetermined value comprising the steps of: a. providing a control signal having a predetermined minimum value; b. initiating a first signal variable in duration from a predetermined minimum value to a value related to the sum of the predetermined minimum value and the value of the control voltage; c. initiating a second signal concurrently with the initiation of the first signal, the second signal having a duration related to the predetermined minimum value; and, d. providing an output signal related to the difference in duration of the first and second signals, the output signal being thereby variable in duration from zero to a value related to the value of the control signal.
Claim 10
Independent Claim
73 words
A method of providing a pulse of selectively variable width coMprising the steps of: a. providing a control signal selectively variable from a value related to a predetermined minimum pulse width to a predetermined maximum; b. providing in response to the control signal a first pulse; c. providing a second pulse having a predetermined pulse width; and, d. subtracting the second pulse from the first pulse to thereby provide a selectively variable width.
Claim 11
Independent Claim
73 words
A method of providing a pulse of selectively variable width coMprising the steps of: a. providing a control signal selectively variable from a value related to a predetermined minimum pulse width to a predetermined maximum; b. providing in response to the control signal a first pulse; c. providing a second pulse having a predetermined pulse width; and, d. subtracting the second pulse from the first pulse to thereby provide a selectively variable width.
Claim 12
Independent Claim
129 words
A method of providing a pulse selectively variable in width from zero to a predetermined value in response to a trigger signal comprising the steps of: a. providing a first pulse having a predetermined width and substantially constant amplitude in response to a trigger signal; b. initiating a second substantially constant amplitude pulse responsively to the trigger signal; c. providing a time varying signal in response to the trigger signal; d. comparing the time varying signal with a signal related in value to the selected pulse width; e. terminating the second pulse responsively to the comparison of the time varying signal; and, f. subtracting the first pulse from the second pulse to provide an output pulse having a substantially constant amplitude and a duration related to the control signal.
Claim 13
Independent Claim
129 words
A method of providing a pulse selectively variable in width from zero to a predetermined value in response to a trigger signal comprising the steps of: a. providing a first pulse having a predetermined width and substantially constant amplitude in response to a trigger signal; b. initiating a second substantially constant amplitude pulse responsively to the trigger signal; c. providing a time varying signal in response to the trigger signal; d. comparing the time varying signal with a signal related in value to the selected pulse width; e. terminating the second pulse responsively to the comparison of the time varying signal; and, f. subtracting the first pulse from the second pulse to provide an output pulse having a substantially constant amplitude and a duration related to the control signal.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |