US3560879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear voltage controlled crystal oscillators
Assignee: United States Department of the Navy
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Filing: 1969-03-12
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Granted: 1971-02-02
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Expires: 1989-03-12
Abstract
Abstract A LINEAR VOLTAGE CONTROLLED CRYSTAL OSCILLATOR HAVING AN AMPLIFIER VARIABLE VOLTAGE FEEDBACK CIRCUIT WITH INDUCTORS, CAPACITORS, AND VARACTORS PRODUCING A VARACTOR NETWORK IN SERIES WITH A CRYSTAL AND INDUCTANCE NETWORK THAT PROVIDE CIRCUIT OSCILLATION WHERE THE PHASE SHIFT THROUGH THE FEEDBACK CIRCUIT IS ZERO, OR AT A FREQUENCY WHERE THE REACTANCE OF THE INDUCTANCE-CAPACITANCE NETWORK CANCELS THE REACTANCE OF THE CRYSTAL NETWORK, WHICH VARACTOR NETWORK IS EASY TO ALIGN TO PROVIDE A LINEAR REACTANCE-VOLTAGE RELATION.
Inventors
- 👤 James A Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:33
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/22; H03C3/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |