Patent US3117293A successfully refreshed from Google Patents.
US3117293A
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US
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Linear frequency sweep of resonant circuit by exponentially varying reverse bias on semiconductor diode
Assignee: BAE Systems Electronics Ltd
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Filing: 1961-11-03
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Granted: 1964-01-07
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Expires: 1981-11-03
Abstract
No abstract record available.
Inventors
- 👤 Mortley Wilfrid Sinden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/08; H03B; H03B23/00; H03C3/10; H03C3/12; H03C3/22; H03C3/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A FREQUENCY VARYING CIRCUIT ARRANGEMENT COMPRISING A RESONANT CIRCUIT HAVING IN A PARALLEL BRANCH THEREOF A VOLTAGE SENSITIVE CONDENSER CONSTITUTED BY A SEMICONDUCTOR DEVICE OF THE KIND PRESENTING A CAPACITANCE WHICH IS DEPENDENT ON THE VALUE OF A REVERSE BIAS VOLTAGE APPLIED TO SAID DEVICE, MEANS FOR DERIVING A VOLTAGE VARYING EXPONENTIALLY WITH TIME AND MEANS FOR APPLYING TO SAID DEVICE AS REVERSE BIAS VOLTAGE A VOLTAGE COMPRISED AT LEAST IN PART OF SAID DERIVED VOLTAGE, THE RELATIONSHIP BETWEEN THE EFFECTIVE CAPACITANCE OF SAID BRANCH AT THE MEAN FREQUENCY OVER WHICH SAID FREQUENCY VARYING ARRANGEMENT IS DESIGNED TO VARY AND THE TOTAL EFFECTIVE CAPACITANCE OF SAID RESONANT CIRCUIT BEING SUCH THAT THE VARIATION OF FREQUENCY IS SUBSTANTIALLY LINEAR.
Claim 2
Dependent Claim
118 words
A FREQUENCY VARYING CIRCUIT ARRANGEMENT COMPRISING A RESONANT CIRCUIT HAVING IN A PARALLEL BRANCH THEREOF A VOLTAGE SENSITIVE CONDENSER CONSTITUTED BY A SEMICONDUCTOR DEVICE OF THE KIND PRESENTING A CAPACITANCE WHICH IS DEPENDENT ON THE VALUE OF A REVERSE BIAS VOLTAGE APPLIED TO SAID DEVICE, MEANS FOR DERIVING A VOLTAGE VARYING EXPONENTIALLY WITH TIME AND MEANS FOR APPLYING TO SAID DEVICE AS REVERSE BIAS VOLTAGE A VOLTAGE COMPRISED AT LEAST IN PART OF SAID DERIVED VOLTAGE, THE RELATIONSHIP BETWEEN THE EFFECTIVE CAPACITANCE OF SAID BRANCH AT THE MEAN FREQUENCY OVER WHICH SAID FREQUENCY VARYING ARRANGEMENT IS DESIGNED TO VARY AND THE TOTAL EFFECTIVE CAPACITANCE OF SAID RESONANT CIRCUIT BEING SUCH THAT THE VARIATION OF FREQUENCY IS SUBSTANTIALLY LINEAR.
References Cited (Backward Citations)
US2570939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |