US3079558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Squelch circuit
Assignee: Collins Radio Co
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Filing: 1960-12-05
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Granted: 1963-02-26
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Expires: 1980-12-05
Abstract
No abstract record available.
Inventors
- 👤 Fred J Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:43
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34; H03G3/344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A RADIO RECEIVER COMPRISING MEANS FOR RECEIVING A SIGNAL CONTAINING AN INTELLIGENCE BEARING SIGNAL AND NOISE SIGNAL, MEANS FOR EXTRACTING FROM THE RECEIVED SIGNAL A DIRECT CURRENT SIGNAL WHOSE MAGNITUDE VARIES PROPORTIONATELY WITH THE AVERAGE POWER OF THE RECEIVED INTELLIGENCE BEARING SIGNAL-PLUS-NOISE SIGNAL, MEANS FOR EXTRACTING THE NOISE SIGNAL FROM SAID RECEIVED SIGNAL, BLANKING MEANS HAVING AN INPUT MEANS AND CONSTRUCTED TO BE RESPONSIVE TO SAID EXTRACTED NOISE SIGNAL FOR BLANKING SAID RADIO RECEIVER WHEN THE AMPLITUDE OF SAID NOISE SIGNAL EXCEEDS A PREDETERMINED LEVEL, AND DIVERTING MEANS COMPRISING A VARIABLE IMPEDANCE AND CONNECTED IN PARALLEL WITH INPUT MEANS OF SAID BLANKING MEANS, SAID VARIABLE IMPEDANCE CONSTRUCTED TO BE RESPONSIVE TO SAID DIRECT CURRENT SIGNAL TO DIVERT FROM SAID BLANKING SIGNAL A PORTION OF SAID EXTRACTED NOISE SIGNAL, WHICH PORTION VARIES IN ACCORDANCE WITH THE MAGNITUDE OF SAID DIRECT CURRENT SIGNAL.
Claim 2
Dependent Claim
142 words
IN A RADIO RECEIVER COMPRISING MEANS FOR RECEIVING A SIGNAL CONTAINING AN INTELLIGENCE BEARING SIGNAL AND NOISE SIGNAL, MEANS FOR EXTRACTING FROM THE RECEIVED SIGNAL A DIRECT CURRENT SIGNAL WHOSE MAGNITUDE VARIES PROPORTIONATELY WITH THE AVERAGE POWER OF THE RECEIVED INTELLIGENCE BEARING SIGNAL-PLUS-NOISE SIGNAL, MEANS FOR EXTRACTING THE NOISE SIGNAL FROM SAID RECEIVED SIGNAL, BLANKING MEANS HAVING AN INPUT MEANS AND CONSTRUCTED TO BE RESPONSIVE TO SAID EXTRACTED NOISE SIGNAL FOR BLANKING SAID RADIO RECEIVER WHEN THE AMPLITUDE OF SAID NOISE SIGNAL EXCEEDS A PREDETERMINED LEVEL, AND DIVERTING MEANS COMPRISING A VARIABLE IMPEDANCE AND CONNECTED IN PARALLEL WITH INPUT MEANS OF SAID BLANKING MEANS, SAID VARIABLE IMPEDANCE CONSTRUCTED TO BE RESPONSIVE TO SAID DIRECT CURRENT SIGNAL TO DIVERT FROM SAID BLANKING SIGNAL A PORTION OF SAID EXTRACTED NOISE SIGNAL, WHICH PORTION VARIES IN ACCORDANCE WITH THE MAGNITUDE OF SAID DIRECT CURRENT SIGNAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |