Patent US4047056A successfully refreshed from Google Patents.
US4047056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-frequency converter
Assignee: Honeywell Inc
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Filing: 1976-11-02
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Granted: 1977-09-06
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Expires: 1996-11-02
Abstract
Abstract A voltage-frequency converter having an integrator of which the inverted input terminal is supplied a voltage to be converted while its non-inverted input terminal is supplied said voltage through a first switch means and a voltage comparator of which the inverted input terminal is supplied an output voltage of said integrator while its non-inverted input terminal is continuously supplied with a constant voltage and selectively supplied with said voltage to be converted through a second switch means, wherein an output of said voltage comparator is made to control said first and second switch means, whereby said voltage to be converted is converted into a signal having a frequency proportional to said voltage to be converted.
Inventors
- 👤 Kazuyoshi Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A voltage-to-frequency converter comprising an integrator having an inverting input terminal and a non-inverting input terminal, an input signal terminal, circuit means connecting said input signal terminal to said inverting input terminal, first switch means connecting said input signal terminal to said non-inverting input terminal, a signal comparator having an inverting input terminal and a non-inverting input terminal, circuit means connecting an output of said integrator to said inverting input of said comparator, reference signal means connected to said non-inverting input of said comparator, second switch means connecting said input signal terminal to said non-inverting input of said comparator and means connecting an output of said comparator to said first and second switch means to concurrently operate said first and second switch means.
Claim 2
Dependent Claim
123 words
A voltage-to-frequency converter comprising an integrator having an inverting input terminal and a non-inverting input terminal, an input signal terminal, circuit means connecting said input signal terminal to said inverting input terminal, first switch means connecting said input signal terminal to said non-inverting input terminal, a signal comparator having an inverting input terminal and a non-inverting input terminal, circuit means connecting an output of said integrator to said inverting input of said comparator, reference signal means connected to said non-inverting input of said comparator, second switch means connecting said input signal terminal to said non-inverting input of said comparator and means connecting an output of said comparator to said first and second switch means to concurrently operate said first and second switch means.
Claim 3
Dependent Claim
31 words
A voltage-to-frequency converter as set forth in claim 1 wherein said first and second switching means each include field-effect transistors having their gate electrodes connected to the output of said comparator.
Claim 4
Dependent Claim
38 words
A voltage-to-frequency converter as set forth in claim 1 wherein said first and second switching means each include switching diodes connected to the output of said comparator to be biased thereby between a conducting and a non-conducting state.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |