Patent US3196354A successfully refreshed from Google Patents.
US3196354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal to noise ratio controlled squelch circuit
Assignee: Motorola Solutions Inc
•
Filing: 1962-06-20
•
Granted: 1965-07-20
•
Expires: 1982-06-20
Abstract
No abstract record available.
Inventors
- 👤 Lloyd R Engelbrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:18
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN A COMMUNICATIONS RECEIVER FOR TRANSLATING A MODULATED RECEIVED SIGNAL, A SIGNAL-TO-NOISE OPERATING SQUELCH CIRCUIT INCLUDING IN COMBINATION, SIGNAL LIMITING MEANS, MEANS COUPLING A PORTION OF THE TRANSLATED SIGNAL OF SAID RECEIVER TO SAID LIMITING MEANS, WITH SAID LIMITING MEANS CLIPPING ALL AMPLITUDE INFORMATION FROM SAID SIGNAL EXCEPT MODULATION ENVELOPE MINIMA WHICH DO NOT EXCEED THE LIMITING LEVEL OF SAID LIMITING MEANS, DETECTOR MEANS COUPLED TO SAID LIMITING MEANS TO PROVIDE PULSES IN RESPONSE TO MODULATION ENVELOPE MINIMA WHICH DO NOT EXCEED SAID LIMITING LEVEL, AND MEANS COUPLED TO SAID DETECTOR MEANS TO PROVIDE A CONTROL VOLTAGE HAVING A LEVEL INDICATIVE OF THE NUMBER OF PULSES PROVIDED BY SAID DETECTOR MEANS, WHEREBY AN INCREASED NUMBER OF MODULATION ENVELOPE MINIMA IN THE PRESENCE OF NOISE RESULTS IN A CHANGE IN SAID CONTROL VOLTAGE LEVEL FOR MUTING SAID RECEIVER.
Claim 2
Dependent Claim
137 words
IN A COMMUNICATIONS RECEIVER FOR TRANSLATING A MODULATED RECEIVED SIGNAL, A SIGNAL-TO-NOISE OPERATING SQUELCH CIRCUIT INCLUDING IN COMBINATION, SIGNAL LIMITING MEANS, MEANS COUPLING A PORTION OF THE TRANSLATED SIGNAL OF SAID RECEIVER TO SAID LIMITING MEANS, WITH SAID LIMITING MEANS CLIPPING ALL AMPLITUDE INFORMATION FROM SAID SIGNAL EXCEPT MODULATION ENVELOPE MINIMA WHICH DO NOT EXCEED THE LIMITING LEVEL OF SAID LIMITING MEANS, DETECTOR MEANS COUPLED TO SAID LIMITING MEANS TO PROVIDE PULSES IN RESPONSE TO MODULATION ENVELOPE MINIMA WHICH DO NOT EXCEED SAID LIMITING LEVEL, AND MEANS COUPLED TO SAID DETECTOR MEANS TO PROVIDE A CONTROL VOLTAGE HAVING A LEVEL INDICATIVE OF THE NUMBER OF PULSES PROVIDED BY SAID DETECTOR MEANS, WHEREBY AN INCREASED NUMBER OF MODULATION ENVELOPE MINIMA IN THE PRESENCE OF NOISE RESULTS IN A CHANGE IN SAID CONTROL VOLTAGE LEVEL FOR MUTING SAID RECEIVER.
References Cited (Backward Citations)
US2948808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |