US3588730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency generator combining outputs of two phase locked loops
Assignee: Gordon Engineering Co
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Filing: 1969-11-10
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Granted: 1971-06-28
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Expires: 1989-11-10
Abstract
Abstract IN A PRECISION RADIO FREQUENCY SIGNAL GENERATOR, AN OUTPUT FROM A DIGITALLY CONTROLLED PHASE LOCKED FREQUENCY SYNTHESIZER LOOP IS MIXED WITH AN OUTPUT FROM A TUNABLE PHASE LOCKED VARIABLE FREQUENCY OSCILLATOR LOOP TO PROVIDE A RANGE OF ACCURATE FREQUENCY RF SIGNALS. THE SIGNAL GENERATOR IS PRO- VIDED WITH A DISPLAY WHEREIN THE FREQUENCY OF THE SIGNAL IS PRESENTED BY AN INDICATOR.
Inventors
- 👤 Walter Schreuer
- 👤 Leopold Neumann
- 👤 Sherman Rigby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:47
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/22; H03L7/23; H03B; H03B21/00; H03B21/01; H03B21/02
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |