Patent US3092720A successfully refreshed from Google Patents.
US3092720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing an output signal proportional to the quotient of the amplitudesof two input signals
Assignee: US Philips Corp
•
Filing: 1957-04-22
•
Granted: 1963-06-04
•
Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Vrijer Frederik Willem De
- 👤 Valeton Josue Jean Philippe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:30
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; H; H04; H04N; H04N9/00; H04N9/64; H04N9/68; H04N9/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
AN ELECTRICAL CIRCUIT FOR PRODUCING AN OUTPUT VOLTAGE HAVING AN INSTANTANEOUS AMPLITUDE PROPORTIONAL TO THE INSTANTANEOUS AMPLITUDE OF A FIRST INPUT SIGNAL DIVIDED BY THE INSTANTANEOUS AMPLITUDE OF A SECOND INPUT SIGNAL THE AMPLITUDE OF SAID SECOND SIGNAL BEING AT LEAST SEVERAL TIMES LARGER THAN THAT OF SAID FIRST INPUT SIGNAL, SAID CIRCUIT COMPRISING IN COMBINATION: A GENERATOR FOR PRODUCING A CARRIER OSCILLATION HAVING A FREQUENCY WHICH IS LARGE RELATIVE TO THE HIGHEST FREQUENCY OF ANY COMPONENT OF EITHER SAID FIRST OR SAID SECOND INPUT SIGNALS, A PHASE SHIFTING NETWORK FOR SHIFTING THE PHASE OF SAID CARRIER OSCILLATION THROUGH 90*, FIRST AND SECOND SIGNAL INPUT MEANS FOR SAID FIRST AND SECOND INPUT SIGNALS RESPECTIVELY, FIRST AND SECOND MODULATOR MEANS COUPLED TO SAID FIRST AND SECOND SIGNAL INPUT MEANS RESPECTIVELY, SAID FIRST MODULATOR MEANS HAVING SUPPLIED THERETO THE UNSHIFTED CARRIER OSCILLATION AND SAID FIRST INPUT SIGNAL, SAID SECOND MODULATOR MEANS HAVING SUPPLIED THERETO SAID SECOND INPUT SIGNAL AND PHASE SHIFTED CARRIER OSCILLATION FROM SAID PHASE SHIFTING NET-
Claim 2
Dependent Claim
166 words
AN ELECTRICAL CIRCUIT FOR PRODUCING AN OUTPUT VOLTAGE HAVING AN INSTANTANEOUS AMPLITUDE PROPORTIONAL TO THE INSTANTANEOUS AMPLITUDE OF A FIRST INPUT SIGNAL DIVIDED BY THE INSTANTANEOUS AMPLITUDE OF A SECOND INPUT SIGNAL THE AMPLITUDE OF SAID SECOND SIGNAL BEING AT LEAST SEVERAL TIMES LARGER THAN THAT OF SAID FIRST INPUT SIGNAL, SAID CIRCUIT COMPRISING IN COMBINATION: A GENERATOR FOR PRODUCING A CARRIER OSCILLATION HAVING A FREQUENCY WHICH IS LARGE RELATIVE TO THE HIGHEST FREQUENCY OF ANY COMPONENT OF EITHER SAID FIRST OR SAID SECOND INPUT SIGNALS, A PHASE SHIFTING NETWORK FOR SHIFTING THE PHASE OF SAID CARRIER OSCILLATION THROUGH 90*, FIRST AND SECOND SIGNAL INPUT MEANS FOR SAID FIRST AND SECOND INPUT SIGNALS RESPECTIVELY, FIRST AND SECOND MODULATOR MEANS COUPLED TO SAID FIRST AND SECOND SIGNAL INPUT MEANS RESPECTIVELY, SAID FIRST MODULATOR MEANS HAVING SUPPLIED THERETO THE UNSHIFTED CARRIER OSCILLATION AND SAID FIRST INPUT SIGNAL, SAID SECOND MODULATOR MEANS HAVING SUPPLIED THERETO SAID SECOND INPUT SIGNAL AND PHASE SHIFTED CARRIER OSCILLATION FROM SAID PHASE SHIFTING NET-
References Cited (Backward Citations)
US2525496A
Cited
US2840307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |