Patent US3191127A successfully refreshed from Google Patents.
US3191127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agc with compensation for change in collector capacitance
Assignee: RCA Corp
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Filing: 1962-04-02
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Granted: 1965-06-22
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Expires: 1982-04-02
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Theriault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:29
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/52; H04N5/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A SIGNAL AMPLIFIER SYSTEM HAVING A SOURCE OF SIGNALS TO BE AMPLIFIER AND A SOURCE OF GAIN CONTROL CURRENT, A TRANSISTOR AMPLIFIER CIRCUIT, COMPRISING, IN COMBINATION: A TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR; SIGNAL INPUT CIRCUIT MEANS FOR APPLYING SIGNALS FROM SAID SOURCE OF SIGNALS BETWEEN THE BASE AND EMITTER OF SAID TRANSISTOR; SIGNAL OUTPUT CIRCUIT MEANS FOR SAID TRANSISTOR CONNECTED BETWEEN THE COLLECTOR AND EMITTER OF SAID TRANSISTOR, AND INCLUDING THE COLLECTOR CAPACITANCE OF SAID TRANSISTOR; CIRCUIT MEANS FOR APPLYING SAID GAIN CONTROL CURRENT TO THE EMITTER OF SAID TRANSISTOR, INCLUDING A SEMICONDUCTOR DIODE CONNECTED TO BE TRANSVERSED BY SAID GAIN CONTROL CURRENT IN THE FORWARD DIRECTION; AND MEANS COUPLING SAID DIODE TO SAID SIGNAL OUTPUT CIRCUIT MEANS TO COMPENSATE FOR THE DECREASING COLLECTOR CAPACITANCE OF SAID TRANSISTOR CAUSE BY AN INCREASE IN GAIN CONTROL CURRENT, SAID COMPENSATION BEING EFFECTED BY AN INCREASE IN THE CAPACITANCE OF SAID DIODE WITH INCREASING GAIN CONTROL CURRENT.
Claim 2
Dependent Claim
159 words
IN A SIGNAL AMPLIFIER SYSTEM HAVING A SOURCE OF SIGNALS TO BE AMPLIFIER AND A SOURCE OF GAIN CONTROL CURRENT, A TRANSISTOR AMPLIFIER CIRCUIT, COMPRISING, IN COMBINATION: A TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR; SIGNAL INPUT CIRCUIT MEANS FOR APPLYING SIGNALS FROM SAID SOURCE OF SIGNALS BETWEEN THE BASE AND EMITTER OF SAID TRANSISTOR; SIGNAL OUTPUT CIRCUIT MEANS FOR SAID TRANSISTOR CONNECTED BETWEEN THE COLLECTOR AND EMITTER OF SAID TRANSISTOR, AND INCLUDING THE COLLECTOR CAPACITANCE OF SAID TRANSISTOR; CIRCUIT MEANS FOR APPLYING SAID GAIN CONTROL CURRENT TO THE EMITTER OF SAID TRANSISTOR, INCLUDING A SEMICONDUCTOR DIODE CONNECTED TO BE TRANSVERSED BY SAID GAIN CONTROL CURRENT IN THE FORWARD DIRECTION; AND MEANS COUPLING SAID DIODE TO SAID SIGNAL OUTPUT CIRCUIT MEANS TO COMPENSATE FOR THE DECREASING COLLECTOR CAPACITANCE OF SAID TRANSISTOR CAUSE BY AN INCREASE IN GAIN CONTROL CURRENT, SAID COMPENSATION BEING EFFECTED BY AN INCREASE IN THE CAPACITANCE OF SAID DIODE WITH INCREASING GAIN CONTROL CURRENT.
References Cited (Backward Citations)
US2836713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |