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Patent US3652945A successfully refreshed from Google Patents.
US3652945A
Expired / Lapsed
US
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Circuits for converting the effective value of input electric signals into dc voltages
Assignee: Yokogawa Electric Corp
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Filing: 1971-02-04
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Granted: 1972-03-28
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Expires: 1991-02-04
Abstract
Abstract A circuit for converting the effective value of an input electric signal into a DC voltage comprises an integrator for producing a DC output voltage, a first means for adding the input signal to a signal fed back from the output side of the integrator, a second means for subtracting the signal fed back from the output of the integrator from the input signal, and means for multiplying the output from the first means with the output from the second means for applying the product to the input of the integrator.
Inventors
- 👤 Hisao Nakane
- 👤 Akihisa Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:02
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/02; G06; G06G; G06G7/00; G06G7/12; G06G7/25
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
A circuit for converting the effective value of an input electric signal into a DC voltage, comprising an integrator for producing a DC output voltage, a first means for adding said input signal to a signal fed back from the output side of said integrator, a second means for subtracting said signal fed back from the output of said integrator from said input signal, and means for multiplying the output from said first means with the output from said second means for applying the product to the input of said integrator.
Claim 2
Dependent Claim
91 words
A circuit for converting the effective value of an input electric signal into a DC voltage, comprising an integrator for producing a DC output voltage, a first means for adding said input signal to a signal fed back from the output side of said integrator, a second means for subtracting said signal fed back from the output of said integrator from said input signal, and means for multiplying the output from said first means with the output from said second means for applying the product to the input of said integrator.
Claim 3
Dependent Claim
26 words
The circuit as defined in claim 1 wherein said integrator has a characteristic to sufficiently attenuate the AC component contained in the input to said integrator.
Claim 4
Dependent Claim
24 words
The circuit as defined in claim 1 wherein said integrator includes means for preventing the flow of an output signal of a predetermined polarity.
Claim 5
Dependent Claim
27 words
The circuit as defined in claim 1 wherein said integrator further comprises means for clamping the output signal of said predetermined polarity to a sufficiently small value.
Claim 6
Dependent Claim
56 words
The circuit as defined in claim 1 wherein a variable gain circuit is inserted in the signal transmission circuit from said multiplier means to said integrator, said variable gain circuit manifesting a large gain while said input signal is smaller than a predetermined value whereas a small gain when said input signal exceeds said predetermined value.
Claim 7
Dependent Claim
56 words
The circuit as defined in claim 2 wherein a variable gain circuit is inserted in the signal transmission circuit from said multiplier means to said integrator, said variable gain circuit manifesting a large gain while said input signal is smaller than a predetermined value whereas a small gain when said input signal exceeds said predetermined value.
Claim 8
Dependent Claim
56 words
The circuit as defined in claim 3 wherein a variable gain circuit is inserted in the signal transmission circuit from said multiplier means to said integrator, said variable gain circuit manifesting a large gain while said input signal is smaller than a predetermined value whereas a small gain when said input signal exceeds said predetermined value.
Claim 9
Dependent Claim
55 words
The circuit as defined in claim 4 wherein a variable gAin circuit is inserted in the signal transmission circuit from said multiplier means to said integrator, said variable gain circuit manifesting a large gain while said input signal is smaller than a predetermined value whereas a small gain when said input signal exceeds predetermined value.
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) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |