Patent US3331025A successfully refreshed from Google Patents.
US3331025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency control system for side-band receivers
Assignee: Thales SA
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Filing: 1964-02-12
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Granted: 1967-07-11
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Expires: 1984-02-12
Abstract
No abstract record available.
Inventors
- 👤 Rameau Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:48
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
AN AUTOMATIC FREQUENCY CONTROL SYSTEM FOR SIDEBAND RECEIVERS FOR RECEIVING THE CARRIER AND AT LEAST ONE SIDEBAND, SAID SYSTEM COMPRISING AN INPUT FOR RECEIVING SAID CARRIER AND SAID SIDEBAND; A LOCAL OSCILLATOR INCLUDING FIRST MEANS FOR RAPIDLY VARYING THE FREQUENCY THEREOF AND SECOND MEANS FOR COMPENSATING SLOW FREQUENCY DRIFTS; MIXING MEANS COUPLED TO SAID INPUT AND TO SAID LOCAL OSCILLATOR FOR DERIVING A TRANSLATED CARRIER FREQUENCY SIGNAL; A REFERENCE OSCILLATOR INCLUDING THIRD MEANS FOR RAPIDLY VARYING THE FREQUENCY THEREOF; DISCRIMINATOR MEANS FOR COMPARING SAID TRANSLATED CARRIER FREQUENCY AND SAID REFERENCE OSCILLATOR FREQUENCY; SAID DISCRIMINATOR MEANS HAVING AN OUTPUT FOR PROVIDING AN ERROR VOLTAGE; AND A FIRST, SECOND AND A THIRD FEEDBACK LOOP BETWEEN SAID OUTPUT AND RESPECTIVELY SAID FIRST, SECOND AND THIRD MEANS.
Claim 2
Dependent Claim
123 words
AN AUTOMATIC FREQUENCY CONTROL SYSTEM FOR SIDEBAND RECEIVERS FOR RECEIVING THE CARRIER AND AT LEAST ONE SIDEBAND, SAID SYSTEM COMPRISING AN INPUT FOR RECEIVING SAID CARRIER AND SAID SIDEBAND; A LOCAL OSCILLATOR INCLUDING FIRST MEANS FOR RAPIDLY VARYING THE FREQUENCY THEREOF AND SECOND MEANS FOR COMPENSATING SLOW FREQUENCY DRIFTS; MIXING MEANS COUPLED TO SAID INPUT AND TO SAID LOCAL OSCILLATOR FOR DERIVING A TRANSLATED CARRIER FREQUENCY SIGNAL; A REFERENCE OSCILLATOR INCLUDING THIRD MEANS FOR RAPIDLY VARYING THE FREQUENCY THEREOF; DISCRIMINATOR MEANS FOR COMPARING SAID TRANSLATED CARRIER FREQUENCY AND SAID REFERENCE OSCILLATOR FREQUENCY; SAID DISCRIMINATOR MEANS HAVING AN OUTPUT FOR PROVIDING AN ERROR VOLTAGE; AND A FIRST, SECOND AND A THIRD FEEDBACK LOOP BETWEEN SAID OUTPUT AND RESPECTIVELY SAID FIRST, SECOND AND THIRD MEANS.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |