Patent US3331028A successfully refreshed from Google Patents.
US3331028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage transistor amplifier in which the impedances of the various stages are successively varied to control gain
Assignee: Avco Corp
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Filing: 1965-01-21
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Granted: 1967-07-11
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Gerald B Bay
- 👤 Laughton T Fine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:48
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3052; H03G3/3057
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AN ALTERNATING CURRENT SIGNAL AMPLIFIER COMPRISING: A TRANSISTOR HAVING AT LEAST FIRST AND SECOND VARIABLE IMPEDANCE ALTERNATING CURRENT LOADS, SAID FIRST VARIABLE ALTERNATING CURRENT LOAD IMPEDANCE BEING AN EMITTER LOAD, AND SAID SECOND VARIABLE IMPEDANCE ALTERNATING CURRENT LOAD BEING A COLLECTOR LOAD; A SOURCE OF DIRECT CURRENT FOR QUIESCENTLY BIASING SAID TRANSISTOR; A SOURCE OF AUTOMATIC GAIN CONTROL VOLTAGE HAVING A LEVEL PROPORTIONAL TO SIGNAL; AND MEANS RESPONSIVE TO PREDETERMINED LEVELS OF SAID SOURCE OF AUTOMATIC GAIN CONTROL VOLTAGE FOR SUCCESSIVELY VARYING THE IMPEDANCE OF SAID EMITTER LOAD AND SAID COLLECTOR LOAD IN THE ORDER NAMED FOR DECREASING THE GAIN OF SAID AMPLIFIER IN RESPONSE TO INCREASED SIGNALS.
Claim 2
Dependent Claim
108 words
AN ALTERNATING CURRENT SIGNAL AMPLIFIER COMPRISING: A TRANSISTOR HAVING AT LEAST FIRST AND SECOND VARIABLE IMPEDANCE ALTERNATING CURRENT LOADS, SAID FIRST VARIABLE ALTERNATING CURRENT LOAD IMPEDANCE BEING AN EMITTER LOAD, AND SAID SECOND VARIABLE IMPEDANCE ALTERNATING CURRENT LOAD BEING A COLLECTOR LOAD; A SOURCE OF DIRECT CURRENT FOR QUIESCENTLY BIASING SAID TRANSISTOR; A SOURCE OF AUTOMATIC GAIN CONTROL VOLTAGE HAVING A LEVEL PROPORTIONAL TO SIGNAL; AND MEANS RESPONSIVE TO PREDETERMINED LEVELS OF SAID SOURCE OF AUTOMATIC GAIN CONTROL VOLTAGE FOR SUCCESSIVELY VARYING THE IMPEDANCE OF SAID EMITTER LOAD AND SAID COLLECTOR LOAD IN THE ORDER NAMED FOR DECREASING THE GAIN OF SAID AMPLIFIER IN RESPONSE TO INCREASED SIGNALS.
References Cited (Backward Citations)
US3032704A
Cited
US3193767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |