Patent US3409736A successfully refreshed from Google Patents.
US3409736A
Expired / Lapsed
US
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Phase and frequency correction system
Assignee: RCA Corp
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Filing: 1965-05-17
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Granted: 1968-11-05
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Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Robert N Hurst
- 👤 Lee V Hedlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:11
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A SYSTEM FOR CORRECTING FREQUENCY AND PHASE ERRORS IN A SIGNAL OF THE TYPE CONTAINING A COMPONENT OCCURRING AT A REFERENCE FREQUENCY, SAID SYSTEM COMPRISING: (A) A VARIABLE DELAY MEANS FOR DELAYING SAID SIGNAL IN PROPORTION TO A CONTROL SIGNAL APPLIED TO SAID VARIABLE DELAY MEANS, (B) PHASE DETECTING MEANS FOR PERIODICALLY MEASURING THE PHASE ERROR OF SAID COMPONENT OCCURING AT SAID REFERENCE FREQUENCY AND FOR GENERATING AN ERROR SIGNAL RELATED TO SAID PHASE ERROR, (C) MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR CHANGING SAID ERROR SIGNAL DURING THE PERIOD BETWEEN MEASUREMENTS, SAID CHANGE OCCURRING AT A RATE DETERMINED BY THE PHASE ERROR MEASURED BY SAID PHASE DETECTING MEANS, AND (D) MEANS FOR APPLYING SAID ERROR SIGNAL TO SAID VARIABLE DELAY MEANS TO CONTROL THE DELAY OF SAID VARIABLE DELAY MEANS.
Claim 2
Independent Claim
131 words
A SYSTEM FOR CORRECTING FREQUENCY AND PHASE ERRORS IN A SIGNAL OF THE TYPE CONTAINING A COMPONENT OCCURRING AT A REFERENCE FREQUENCY, SAID SYSTEM COMPRISING: (A) A VARIABLE DELAY MEANS FOR DELAYING SAID SIGNAL IN PROPORTION TO A CONTROL SIGNAL APPLIED TO SAID VARIABLE DELAY MEANS, (B) PHASE DETECTING MEANS FOR PERIODICALLY MEASURING THE PHASE ERROR OF SAID COMPONENT OCCURING AT SAID REFERENCE FREQUENCY AND FOR GENERATING AN ERROR SIGNAL RELATED TO SAID PHASE ERROR, (C) MEANS RESPONSIVE TO SAID ERROR SIGNAL FOR CHANGING SAID ERROR SIGNAL DURING THE PERIOD BETWEEN MEASUREMENTS, SAID CHANGE OCCURRING AT A RATE DETERMINED BY THE PHASE ERROR MEASURED BY SAID PHASE DETECTING MEANS, AND (D) MEANS FOR APPLYING SAID ERROR SIGNAL TO SAID VARIABLE DELAY MEANS TO CONTROL THE DELAY OF SAID VARIABLE DELAY MEANS.
References Cited (Backward Citations)
US3235662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |