Patent US3906379A successfully refreshed from Google Patents.
US3906379A
Expired / Lapsed
US
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Threshold error compensator for pulse width measurement circuit
Assignee: Computer Identics Corp
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Filing: 1974-04-25
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Granted: 1975-09-16
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Expires: 1994-04-25
Abstract
Abstract A threshold error compensator circuit responsive to an input signal and a pulse derived therefrom and having a width determined by the width of the input signal at a predetermined relative amplitude comprising a threshold level generator; a comparator, responsive to the threshold level from the threshold level generator and to the input signal to provide a thresholded signal having a pulse width measured at the threshold level; and a gate responsive to the pulse and thresholded signal to provide an output signal having a pulse width equal to that of the narrower of the pulse and thresholded signal.
Inventors
- 👤 Richard H Tuhro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:52
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/02; H; H03; H03K; H03K5/00; H03K5/01; H03K5/08; H03K5/082
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
An improved pulse width measuring system comprising: a pulse width measuring circuit, responsive to an input signal, for determining the width of an input signal pulse at a predetermined relative amplitude level and providing a pulse width signal representative thereof; a noise rejecting threshold circuit for generating a threshold level exceeding an expected noise level in said input signal; a comparator circuit, responsive to said threshold level and said input signal, for providing thresholded signal pulses in response to the input signal amplitude exceeding said threshold level and rejecting lower amplitude input signal portions as noise; and a gating circuit, responsive to said pulse width measuring circuit and said comparator circuit, for passing only said pulse width signals occurring concurrently with said threshold signal pulses and rejecting other pulse width signals as noise.
Claim 2
Dependent Claim
133 words
An improved pulse width measuring system comprising: a pulse width measuring circuit, responsive to an input signal, for determining the width of an input signal pulse at a predetermined relative amplitude level and providing a pulse width signal representative thereof; a noise rejecting threshold circuit for generating a threshold level exceeding an expected noise level in said input signal; a comparator circuit, responsive to said threshold level and said input signal, for providing thresholded signal pulses in response to the input signal amplitude exceeding said threshold level and rejecting lower amplitude input signal portions as noise; and a gating circuit, responsive to said pulse width measuring circuit and said comparator circuit, for passing only said pulse width signals occurring concurrently with said threshold signal pulses and rejecting other pulse width signals as noise.
Claim 3
Dependent Claim
132 words
An improved pulse width measuring system comprising: a half-amplitude width measuring circuit, responsive to an input signal, for determining the width of an input signal pulse at half amplitude level and providing a pulse width signal representative thereof; a noise rejecting threshold circuit for generating a threshold level exceeding an expected noise level in said input signal; a comparator circuit, responsive to said threshold level and said input signal, for providing thresholded signal pulses in response to the input signal amplitude exceeding said threshold level and rejecting lower amplitude input signal portions as noise; and a gating circuit, responsive to said half-amplitude pulse width measuring circuit and said comparator circuit, for passing only said pulse width signals occurring concurrently with said threshold signal pulses and rejecting other pulse width signals as noise.
Claim 4
Dependent Claim
132 words
An improved pulse width measuring system comprising: a half-amplitude width measuring circuit, responsive to an input signal, for determining the width of an input signal pulse at half amplitude level and providing a pulse width signal representative thereof; a noise rejecting threshold circuit for generating a threshold level exceeding an expected noise level in said input signal; a comparator circuit, responsive to said threshold level and said input signal, for providing thresholded signal pulses in response to the input signal amplitude exceeding said threshold level and rejecting lower amplitude input signal portions as noise; and a gating circuit, responsive to said half-amplitude pulse width measuring circuit and said comparator circuit, for passing only said pulse width signals occurring concurrently with said threshold signal pulses and rejecting other pulse width signals as noise.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |