US4066983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage controlled Clapp oscillator having output isolated from tuned circuit
Assignee: Raytheon Co
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Filing: 1976-12-02
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Granted: 1978-01-03
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Expires: 1996-12-02
Abstract
Abstract A voltage controlled oscillator arrangement having improved characteristics is shown to include a Clapp type oscillator utilizing a transistor as the active element, the electrodes of such transistor being connected to an electronically tunable resonant circuit and to a load in such a fashion as to effectively separate the two.
Inventors
- 👤 Zvi Gallani
- 👤 Joseph A. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:58
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1231; H03B5/1203; H03B5/1237; H03B5/124; H03B5/1243; H03B2200/00; H03B2200/0002; H03B2200/0006; H03B2200/003; H03B2200/004; H03B2201/00; H03B2201/02; H03B2201/0208
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
A voltage tunable oscillator comprising: a. a transistor having first, second and third electrodes, said first electrode being grounded; b. means connected to said second electrode and comprising an inductor, a capacitor and a varactor to form a resonant circuit across the interelectrode capacitance between said first and said second electrodes; c. a feedback circuit comprising the interelectrode capacitance between said first and third electrodes; d. an output circuit connected to said third electrode and including a variable capacitor for matching the impedance of said output circuit; and e. means for biasing said second and third electrodes and for controlling the capacitance of the varactor thereby to control the frequency of operation.
Claim 2
Dependent Claim
112 words
A voltage tunable oscillator comprising: a. a transistor having first, second and third electrodes, said first electrode being grounded; b. means connected to said second electrode and comprising an inductor, a capacitor and a varactor to form a resonant circuit across the interelectrode capacitance between said first and said second electrodes; c. a feedback circuit comprising the interelectrode capacitance between said first and third electrodes; d. an output circuit connected to said third electrode and including a variable capacitor for matching the impedance of said output circuit; and e. means for biasing said second and third electrodes and for controlling the capacitance of the varactor thereby to control the frequency of operation.
Claim 3
Dependent Claim
25 words
A voltage tunable oscillator as in claim 1 wherein said first, second and third electrodes of said transistor comprise collector, base and emitter electrodes respectively.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |