US3196291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision a.c. to d.c. converter
Assignee: General Electric Co
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Filing: 1963-03-18
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Granted: 1965-07-20
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Morton P Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:11
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/25; G01; G01R; G01R19/00; G01R19/22; H; H03; H03F; H03F3/00; H03F3/38; H03F3/387
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A MEASURING CIRCUIT FOR CONVERTING INPUT A.C. SIGNALS TO D.C. SIGNALS COMPRISING: (A) AN INPUT RESISTOR FOR DERIVING AN INPUT CURRENT PROPORTIONAL TO THE INPUT A.C. SIGNAL TO BE CONVERTED TO D.C.; (B) A RECTIFIER CONNECTED IN SERIES WITH SAID INPUT RESISTOR FOR HALF WAVE RECTIFICATION OF SAID INPUT SIGNAL; (C) AN OPERATIONAL AMPLIFIER CONNECTED IN PARALLEL WITH SAID RECTIFIER; AND (D) A COUPLING CAPACITOR CONNECTED IN SERIES WITH SAID AMPLIFIER AND BETWEEN SAID RECTIFIER AND SAID AMPLIFIER IN SUCH A MANNER THAT THE CURRENT THROUGH SAID RECTIFIER SUBSTANTIALLY EQUALS THE INPUT CURRENT SIGNAL OVER A HALF CYCLE AND REVERSE CURRENTS ARE BLOCKED.
Claim 2
Dependent Claim
103 words
A MEASURING CIRCUIT FOR CONVERTING INPUT A.C. SIGNALS TO D.C. SIGNALS COMPRISING: (A) AN INPUT RESISTOR FOR DERIVING AN INPUT CURRENT PROPORTIONAL TO THE INPUT A.C. SIGNAL TO BE CONVERTED TO D.C.; (B) A RECTIFIER CONNECTED IN SERIES WITH SAID INPUT RESISTOR FOR HALF WAVE RECTIFICATION OF SAID INPUT SIGNAL; (C) AN OPERATIONAL AMPLIFIER CONNECTED IN PARALLEL WITH SAID RECTIFIER; AND (D) A COUPLING CAPACITOR CONNECTED IN SERIES WITH SAID AMPLIFIER AND BETWEEN SAID RECTIFIER AND SAID AMPLIFIER IN SUCH A MANNER THAT THE CURRENT THROUGH SAID RECTIFIER SUBSTANTIALLY EQUALS THE INPUT CURRENT SIGNAL OVER A HALF CYCLE AND REVERSE CURRENTS ARE BLOCKED.
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |