US3192487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor oscillator controllable in frequency
Assignee: US Philips Corp
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Filing: 1960-05-18
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Granted: 1965-06-29
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Expires: 1980-05-18
Abstract
No abstract record available.
Inventors
- 👤 Noordanus Johannes
- 👤 Marcel Antoine Arnold Gh Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:04
CPC Classifications
H; H03; H03C; H03C3/00; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1203; H03B5/1231; H03B5/1237; H03B5/1271
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN OSCILLATOR COMPRISING A TRANSISTOR HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, MEANS PROVIDING A BIAS VOLTAGE BETWEEN SAID BASE AND EMITTER ELECTRODES, RESONANT CIRCUIT MEANS CONNECTED BETWEEN SAID EMITTER AND COLLECTOR ELECTRODES IN A POSITIVE FEEDBACK ARRANGEMENT AND PROPORTIONED TO PRODUCE OSCILLATIONS OF SUFFICIENT AMPLITUDE AT THE COLLECTOR ELECTRODE TO CAUSE THE TOTAL COLLECTOR CURRENT OF SAID TRANSMITTOR TO INVERT ITS POLARITY DURING A PORTION OF EACH CYCLE OF SAID OSCILLATIONS, SAID BIAS VOLTAGE HAVING A MAGNITUDE THAT PERMITS EMITTER CURRENT IN SAID TRANSISTOR DURING ONLY A PART OF EACH SAID CYCLE, AND MEANS FOR VARYING SAID BIAS VOLTAGE WHEREBY THE FREQUENCY OF SAID OSCILLATIONS IS VARIED.
Claim 2
Dependent Claim
107 words
AN OSCILLATOR COMPRISING A TRANSISTOR HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, MEANS PROVIDING A BIAS VOLTAGE BETWEEN SAID BASE AND EMITTER ELECTRODES, RESONANT CIRCUIT MEANS CONNECTED BETWEEN SAID EMITTER AND COLLECTOR ELECTRODES IN A POSITIVE FEEDBACK ARRANGEMENT AND PROPORTIONED TO PRODUCE OSCILLATIONS OF SUFFICIENT AMPLITUDE AT THE COLLECTOR ELECTRODE TO CAUSE THE TOTAL COLLECTOR CURRENT OF SAID TRANSMITTOR TO INVERT ITS POLARITY DURING A PORTION OF EACH CYCLE OF SAID OSCILLATIONS, SAID BIAS VOLTAGE HAVING A MAGNITUDE THAT PERMITS EMITTER CURRENT IN SAID TRANSISTOR DURING ONLY A PART OF EACH SAID CYCLE, AND MEANS FOR VARYING SAID BIAS VOLTAGE WHEREBY THE FREQUENCY OF SAID OSCILLATIONS IS VARIED.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |