Patent US3231823A successfully refreshed from Google Patents.
US3231823A
Expired / Lapsed
US
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Spurious noise suppression circuit integrating low frequencies, by-passing high frequencies
Assignee: International Standard Electric Corp
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Filing: 1962-07-10
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Granted: 1966-01-25
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Garfield William Littery
- 👤 Babb Alexander Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:52
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A NOISE SUPPRESSION CIRCUIT COMPRISING A SOURCE OF SIGNALS, A FIRST AMPLITUDE LIMITER COUPLED TO SAID SOURCE OF SIGNALS, AN INTEGRATING NETWORK, A GATE CIRCUIT, A CONTROL CIRCUIT, MEANS COUPLING SAID INTEGRATING NETWORK, GATE AND CONTROL CIRCUITS, TO THE OUTPUT OF SAID FIRST AMPLITUDE LIMITER, SAID CONTROL CIRCUIT BEING RESPONSIVE TO THE FREQUENCY OF SIGNALS FROM SAID FIRST AMPLITUDE LIMITER AND COMPRISING MEANS TO DERIVE A VARYING BIAS FROM SAID SIGNAL, A SOURCE OF CONSANT BIAS, MEANS TO COMBINE BOTH VARYING AND DIRECT BIAS, MEANS TO COUPLE SAID COMBINED BIAS TO SAID GATE CIRCUIT TO CAUSE SAID GATE CIRCUIT TO BECOME NON-CONDUCTIVE AT SIGNAL FREQUENCIES BELOW A GIVEN FREQUENCY AND TO BECOME CONDUCTIVE AT FREQUENCY ABOVE SAID GIVEN FREQUENCY, A COMBINING CIRCUIT, MEANS COUPLING THE OUTPUT OF SAID INTEGRATING CIRCUIT AND SAID GATE CIR-
Claim 2
Dependent Claim
134 words
A NOISE SUPPRESSION CIRCUIT COMPRISING A SOURCE OF SIGNALS, A FIRST AMPLITUDE LIMITER COUPLED TO SAID SOURCE OF SIGNALS, AN INTEGRATING NETWORK, A GATE CIRCUIT, A CONTROL CIRCUIT, MEANS COUPLING SAID INTEGRATING NETWORK, GATE AND CONTROL CIRCUITS, TO THE OUTPUT OF SAID FIRST AMPLITUDE LIMITER, SAID CONTROL CIRCUIT BEING RESPONSIVE TO THE FREQUENCY OF SIGNALS FROM SAID FIRST AMPLITUDE LIMITER AND COMPRISING MEANS TO DERIVE A VARYING BIAS FROM SAID SIGNAL, A SOURCE OF CONSANT BIAS, MEANS TO COMBINE BOTH VARYING AND DIRECT BIAS, MEANS TO COUPLE SAID COMBINED BIAS TO SAID GATE CIRCUIT TO CAUSE SAID GATE CIRCUIT TO BECOME NON-CONDUCTIVE AT SIGNAL FREQUENCIES BELOW A GIVEN FREQUENCY AND TO BECOME CONDUCTIVE AT FREQUENCY ABOVE SAID GIVEN FREQUENCY, A COMBINING CIRCUIT, MEANS COUPLING THE OUTPUT OF SAID INTEGRATING CIRCUIT AND SAID GATE CIR-
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |