Patent US3102236A successfully refreshed from Google Patents.
US3102236A
Expired / Lapsed
US
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Squelch circuit controlled by demodulated voice signal
Assignee: Collins Radio Co
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Filing: 1960-05-05
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Granted: 1963-08-27
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Expires: 1980-05-05
Abstract
No abstract record available.
Inventors
- 👤 Donald L Eichenberger
- 👤 Edgar O Schoenike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:15
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34; H03G3/342
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A RADIO RECEIVING SYSTEM HAVING A DEMODULATOR, A SWITCHING CONTROL CIRCUIT HAVING FIRST AND SECOND SYLLABIC RATE DETECTORS, FIRST AND SECOND FILTER CIRCUIT COUPLING SAID DEMODULATOR TO THE INPUTS OF SAID FIRST AND SECOND SYLLABIC RATE DETECTORS RESPECTIVELY, SAID FIRST FILTER CIRCUIT HAVING A FREQUENCY BAND-PASS CHARACTERISTIC FOR PASSING SIGNAL AND NOISE NORMALLY HAVING A GREATER SIGNAL-TONOISE RATIO THAN THAT PASSED BY SAID SECOND FILTER CIRCUIT, A SWITCHING CIRCUIT, MEANS FOR APPLYING THE DIFFERENCE IN THE VOLTAGES DERIVED FROM THE OUTPUTS OF SAID FIRST AND SECOND SYLLABIC RATE DETECTORS TO SAID SWITCHING CIRCUIT, AND SAID SWITCHING CIRCUIT OPERATING IN RESPONSE TO THE RATIO OF THE OUTPUT VOLTAGE OF SAID FIRST SYLLABIC RATE FILTER TO THE OUTPUT VOLTAGE OF SAID SECOND SYLLABIC RATE FILTER EXCEEDING A PREDETERMINED VALVE.
Claim 2
Dependent Claim
128 words
IN A RADIO RECEIVING SYSTEM HAVING A DEMODULATOR, A SWITCHING CONTROL CIRCUIT HAVING FIRST AND SECOND SYLLABIC RATE DETECTORS, FIRST AND SECOND FILTER CIRCUIT COUPLING SAID DEMODULATOR TO THE INPUTS OF SAID FIRST AND SECOND SYLLABIC RATE DETECTORS RESPECTIVELY, SAID FIRST FILTER CIRCUIT HAVING A FREQUENCY BAND-PASS CHARACTERISTIC FOR PASSING SIGNAL AND NOISE NORMALLY HAVING A GREATER SIGNAL-TONOISE RATIO THAN THAT PASSED BY SAID SECOND FILTER CIRCUIT, A SWITCHING CIRCUIT, MEANS FOR APPLYING THE DIFFERENCE IN THE VOLTAGES DERIVED FROM THE OUTPUTS OF SAID FIRST AND SECOND SYLLABIC RATE DETECTORS TO SAID SWITCHING CIRCUIT, AND SAID SWITCHING CIRCUIT OPERATING IN RESPONSE TO THE RATIO OF THE OUTPUT VOLTAGE OF SAID FIRST SYLLABIC RATE FILTER TO THE OUTPUT VOLTAGE OF SAID SECOND SYLLABIC RATE FILTER EXCEEDING A PREDETERMINED VALVE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |