US3555446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency synthesizer
Assignee: RACAL-DANA INSTRUMENTS Inc
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Filing: 1969-01-17
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Granted: 1971-01-12
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Expires: 1989-01-17
Abstract
Abstract A FREQUENCY SYNTHESIZER IS A MEANS FOR PRODUCING A PERIODIC, ELECTRICAL SIGNAL AT A FREQUENCY WHICH IS SELECTED NUMERICALLY. THE PREFERRED FROM OF FREQUENCY SYNTHESIZER PRODUCES A SIGNAL WHICH IS PHASE COHERENT WITH A FIXED FREQUENCY, REFERENCE PERIODIC SIGNAL. THE SIGNAL IS CONSIDERED TO BE PHASE COHERENT IF IT PRODUCES N CYCLES DURING THE TIME INTERVAL IN WHICH THE REFERENCE SIGNAL COMPUTES M CYCLES. BOTH M AND N MUST BE INTEGERS, BUT MAY BE LARGE.
Inventors
- 👤 Noel B Braymer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:00
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/18; H03L7/181
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |