US3153189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuation network automatically controlled by level of signal carrier
Assignee: Westinghouse Electric Corp
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Filing: 1961-02-15
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Granted: 1964-10-13
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Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 Harold E Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:27
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A RADIO FREQUENCY RECEIVING CHANNEL FOR RECEIVING AND UTILIZING A RADIO FREQUENCY CARRIER MODULATED WITH INTELLIGENCE SIGNALS, SAID CHANNEL INCLUDING A SIGNAL ATTENUATOR HAVING FIRST AND SECOND INPUT TERMINALS AND FIRST AND SECOND OUTPUT TERMINALS, A PAIR OF SUBSTANTIALLY EQUAL IMPEDANCES HAVING A JUNCTION THEREBETWEEN CONNECTED IN SERIES BETWEEN SAID FIRST TERMINALS, A CONNECTION BETWEEN SAID SECOND TERMINALS, FIRST AND SECOND SEMICONDUCTOR DIODES WHOSE DYNAMIC IMPEDANCES VARY AS FUNCTIONS OF BIASING POTENTIAL APPLIED THERETO, SAID FIRST DIODE BEING COUPLED BETWEEN SAID FIRST TERMINALS, SAID SECOND DIODE BEING COUPLED BETWEEN THE JUNCTION BETWEEN SAID PAIR OF SUBSTANTIALLY EQUAL IMPEDANCES AND SAID CONNECTION, MEANS DERIVING A DIRECT CURRENT AUTOMATIC GAIN CONTROL SIGNAL REPRESENTATIVE OF THE CARRIER AMPLITUDE, AND MEANS RESPONSIVE TO SAID SIGNAL TO SIMULTANEOUSLY OPPOSITELY VARY BIAS ON SAID FIRST AND SECOND SEMICONDUCTOR DIODES.
Claim 2
Dependent Claim
133 words
A RADIO FREQUENCY RECEIVING CHANNEL FOR RECEIVING AND UTILIZING A RADIO FREQUENCY CARRIER MODULATED WITH INTELLIGENCE SIGNALS, SAID CHANNEL INCLUDING A SIGNAL ATTENUATOR HAVING FIRST AND SECOND INPUT TERMINALS AND FIRST AND SECOND OUTPUT TERMINALS, A PAIR OF SUBSTANTIALLY EQUAL IMPEDANCES HAVING A JUNCTION THEREBETWEEN CONNECTED IN SERIES BETWEEN SAID FIRST TERMINALS, A CONNECTION BETWEEN SAID SECOND TERMINALS, FIRST AND SECOND SEMICONDUCTOR DIODES WHOSE DYNAMIC IMPEDANCES VARY AS FUNCTIONS OF BIASING POTENTIAL APPLIED THERETO, SAID FIRST DIODE BEING COUPLED BETWEEN SAID FIRST TERMINALS, SAID SECOND DIODE BEING COUPLED BETWEEN THE JUNCTION BETWEEN SAID PAIR OF SUBSTANTIALLY EQUAL IMPEDANCES AND SAID CONNECTION, MEANS DERIVING A DIRECT CURRENT AUTOMATIC GAIN CONTROL SIGNAL REPRESENTATIVE OF THE CARRIER AMPLITUDE, AND MEANS RESPONSIVE TO SAID SIGNAL TO SIMULTANEOUSLY OPPOSITELY VARY BIAS ON SAID FIRST AND SECOND SEMICONDUCTOR DIODES.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |