US3245077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-stable receiver
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1964-08-28
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Granted: 1966-04-05
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Expires: 1984-08-28
Abstract
No abstract record available.
Inventors
- 👤 Ross E Graves
- 👤 Don M Jacob
- 👤 Jacob M Sacks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A SYSTEM HAVING AT LEAST TWO PHASE-LOCKED LOOP CIRCUITS IN WHICH EACH LOOP CIRCUIT IS ADAPTED TO PHASE LOCK ON THE DIFFERENCE BETWEEN A RECEIVED SIGNAL AND AN INJECTED SIGNAL DIFFERING IN FREQUENCY BY AN ARBITRARILY SELECTED OFFSET FREQUENCY COMPRISING: MEANS IN EACH OF SAID LOOPS FOR DETECTING SAID OFFSET FREQUENCY, MEANS FOR ADDING SAID DETECTED SIGNALS IN PHASE OPPOSITION TO PRODUCE AN ERROR SIGNAL, AND MEANS FOR CONTROLLING THE PHASE OF ONE OF SAID SIGNALS WITH SAID ERROR SIGNAL TO MINIMIZE SAID ERROR SIGNAL.
Claim 2
Dependent Claim
86 words
IN A SYSTEM HAVING AT LEAST TWO PHASE-LOCKED LOOP CIRCUITS IN WHICH EACH LOOP CIRCUIT IS ADAPTED TO PHASE LOCK ON THE DIFFERENCE BETWEEN A RECEIVED SIGNAL AND AN INJECTED SIGNAL DIFFERING IN FREQUENCY BY AN ARBITRARILY SELECTED OFFSET FREQUENCY COMPRISING: MEANS IN EACH OF SAID LOOPS FOR DETECTING SAID OFFSET FREQUENCY, MEANS FOR ADDING SAID DETECTED SIGNALS IN PHASE OPPOSITION TO PRODUCE AN ERROR SIGNAL, AND MEANS FOR CONTROLLING THE PHASE OF ONE OF SAID SIGNALS WITH SAID ERROR SIGNAL TO MINIMIZE SAID ERROR SIGNAL.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |