Patent US4074190A successfully refreshed from Google Patents.
US4074190A
Expired / Lapsed
US
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Signal measuring apparatus
Assignee: National Research Development Corp UK
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Filing: 1976-02-05
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Granted: 1978-02-14
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Expires: 1996-02-05
Abstract
Abstract Apparatus for measuring the time integral of a signal between pairs of time points comprises a ramp voltage generator and a plurality of pairs of potentiometers. A comparator circuit is associated with each potentiometer to provide a switching signal at the time point when the ramp voltage becomes equal to the potentiometer voltage. The switching signals are applied to a gate which is held open between each pair of time points to allow the signal to be measured to be passed to a suitable measuring means. Such measuring means may comprise a voltage-to-frequency converter and a counter so that the output of the counter represents the time integral of the signal.
Inventors
- 👤 Walter Bunting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:48
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/003; G01R17/00; G01R17/02; G01R17/04; G01R23/00; G01R23/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
Signal measuring apparatus for measuring selected pairs of a time varying signal comprising measuring means for measuring the integral with respect to time of parts of a time varying signal gated to said measuring means, a ramp voltage generator, a plurality of pairs of generators of dc voltages of adjustable magnitudes, a comparator circuit associated with each dc voltage generator for providing a switching signal when the output of the ramp generator is equal to the value of the voltage provided by its associated dc voltage generator, gating means for gating a signal to be measured to said measuring means when a switching signal is provided from one of the dc voltage generators to a pair and for blocking such signal when a switching signal is provided from the other dc voltage generator of a pair.
Claim 2
Dependent Claim
136 words
Signal measuring apparatus for measuring selected pairs of a time varying signal comprising measuring means for measuring the integral with respect to time of parts of a time varying signal gated to said measuring means, a ramp voltage generator, a plurality of pairs of generators of dc voltages of adjustable magnitudes, a comparator circuit associated with each dc voltage generator for providing a switching signal when the output of the ramp generator is equal to the value of the voltage provided by its associated dc voltage generator, gating means for gating a signal to be measured to said measuring means when a switching signal is provided from one of the dc voltage generators to a pair and for blocking such signal when a switching signal is provided from the other dc voltage generator of a pair.
Claim 3
Dependent Claim
15 words
The apparatus as claimed in claim 1 in which the dc voltage generators comprise potentiometers.
Claim 4
Dependent Claim
45 words
The apparatus as claimed in claim 1 in which the measuring means comprises a voltage-to-frequency converter and a counter whereby the output of the counter for the time in which the gating means is open represents the time integral of the signal in that time.
References Cited (Backward Citations)
US3122729A
Cited
US3445839A
Cited
US3496562A
Cited
US3745556A
Cited
US3786358A
Cited
US3975684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |