US4785264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual FET oscillator
Assignee: Motorola Solutions Inc
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Filing: 1987-05-28
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Granted: 1988-11-15
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Expires: 2007-05-28
Abstract
Abstract A dual FET oscillator includes a first J-FET and a second J-FET connected to it as a source follower. A turned circuit is connected to the gate of the first J-FET and to the second J-FET. Bias voltage is supplied to both J-FET's. Schottky diodes are connected to both J-FET's to limit gate-source voltage.
Inventors
- 👤 Robert S. Kaltenecker
- 👤 Robert E. Stengel
- 👤 Ralph T. Enderby
- 👤 James S. Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:33
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1203; H03B5/1228; H03B2200/00; H03B2200/0002; H03B2200/0008; H03B2200/003; H03B2200/0032
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A dual FET oscillator suitable for use at UHF frequencies including first and second J-FET's each having gate, drain and sorce connections comprising: resonance means connected to the gate of the first J-FET and to the second J-FET, bias voltage means connected to the first and second FET's, and the second J-FET being connected to the first J-FET as a source follower.
Claim 2
Dependent Claim
62 words
A dual FET oscillator suitable for use at UHF frequencies including first and second J-FET's each having gate, drain and sorce connections comprising: resonance means connected to the gate of the first J-FET and to the second J-FET, bias voltage means connected to the first and second FET's, and the second J-FET being connected to the first J-FET as a source follower.
Claim 3
Dependent Claim
24 words
A dual FET oscillator as defined in claim 1, in which: Schottky diodes are connected to each of the J-FET's to limit gate-source voltages.
Claim 4
Dependent Claim
17 words
A dual FET oscillator as defined in claim 1, in which: the oscillator comprises a Colpitts oscillator.
Claim 5
Dependent Claim
24 words
A dual FET oscillator as defined in claim 1, in which: the oscillator has an output coupled to the drain of the first J-FET.
References Cited (Backward Citations)
US4216443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |