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US3258720A
Expired / Lapsed
US
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Self-tuning harmonic-mode crystal oscillator circuit
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:22
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36; H03B5/362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A SELF-TUNING HARMONIC-MODE CRYSTAL OSCILLATOR CIRCUIT COMPRISING: A TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES; A SOURCE OF FIXED POTENTIAL; MEANS COUPLING SAID BASE ELECTRODE TO GROUND POTENTIAL; MEANS COUPLING SAID COLLECTOR ELECTRODE TO SAID SOURCE OF FIXED POTENTIALO; A LOW Q TANK CIRCUIT COUPLED TO SAID EMITTER AND COLLECTOR ELECTRODES AND BEING, ESSENTIALLY, TUNED BY THE CAPACITANCE BETWEEN SAID EMITTER AND COLLECTOR ELECTRODES; A CRYSTAL COUPLING SAID EMITTER TO A TAP POINT IN SAID TANK CIRCUIT; AND RESISTIVE MEANS COUPLED TO SAID TANK CIRCUIT TO MAINTAINS SAID TANK CIRCUIT AT A LOW Q VALUE.
Claim 2
Dependent Claim
95 words
A SELF-TUNING HARMONIC-MODE CRYSTAL OSCILLATOR CIRCUIT COMPRISING: A TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES; A SOURCE OF FIXED POTENTIAL; MEANS COUPLING SAID BASE ELECTRODE TO GROUND POTENTIAL; MEANS COUPLING SAID COLLECTOR ELECTRODE TO SAID SOURCE OF FIXED POTENTIALO; A LOW Q TANK CIRCUIT COUPLED TO SAID EMITTER AND COLLECTOR ELECTRODES AND BEING, ESSENTIALLY, TUNED BY THE CAPACITANCE BETWEEN SAID EMITTER AND COLLECTOR ELECTRODES; A CRYSTAL COUPLING SAID EMITTER TO A TAP POINT IN SAID TANK CIRCUIT; AND RESISTIVE MEANS COUPLED TO SAID TANK CIRCUIT TO MAINTAINS SAID TANK CIRCUIT AT A LOW Q VALUE.
References Cited (Backward Citations)
US3041550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |