US3233184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single ended transistor amplifier including a biasing network with capacitor voltage stabilization
Assignee: RCA Corp
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Filing: 1961-06-19
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Granted: 1966-02-01
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Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl F Wheatley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:40
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3083; H03F3/3086; H03F3/3098; H03F3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
239 words
IN A SIGNAL TRANSLATING SYSTEM, THE COMBINATION OF A TWO-STAGE TRANSISTOR AMPLIFIER AND A DRIVER AMPLIFIER STAGE BOTH COUPLED IN CASCADE RELATION TO A SINGLE-ENDED CLASS B TYPE TRANSISTOR POWER AMPLIFIER, SAID TWO-STAGE AMPLIFIER HAVING A DIODE-STABLIZED EMITTER CIRCUIT IN A FIRST STAGE AND AN EMITTER CIRCUIT IN A SECOND STAGE FEEDBACK-COUPLED TO SAID FIRST STAGE AND SAID DRIVER STAGE HAVING AN EMITTER CIRCUIT INCLUDING EMITTER RESISTOR ELEMENTS CONNECTED TO SYSTEM GROUND AND PROVIDING A SERIES CONNECTION THERETO FROM THE SECOND STAGE EMITTER CIRCUIT, SAID POWER AMPLIFIER COMPRISING AT LEAST TWO POWER TRANSISTOR DEVICES DIRECTLY SERIES COUPLED IN EACH HALF THEREOF, MEANS PROVIDING A LOW-IMPEDANCE SIGNAL OUTPUT CIRCUIT CONNECTED IN COMMON WITH SAID SERIES COUPLED DEVICES FOR RECEIVING OUTPUT SIGNALS THEREFROM IN PUSH-PULL RELATION, MEANS CONNECTED WITH A FIRST OF SAID TRANSISTOR DEVICES IN EACH SERIES FOR OPERATION AS A LINEARLY CONTROLLED COMMON-EMITTER AMPLIFIER TO DRIVE A SECOND OF SAID TRANSISTOR DEVICES IN EACH SERIES AS A COMMON-BASE AMPLIFIER AND INTO CURRENT SATURATION IN ADVANCE OF SAID FIRST TRANSISTOR DEVICES FOR INCREASED POWER OUTPUT, MEANS PROVIDING A SERIES-RESISTANCE BIASING NETWORK FOR EACH HALF OF THE AMPLIFIER CONNECTED FOR APPLYING OPERATIONAL BASE VOLTAGES TO SAID DEVICES THEREIN, AND VOLTAGE STABILIZING AND CONTROL MEANS IN EACH NET WORK INCLUDING A CONTROL DIODE SERIALLY THEREIN AND A CONTROL CAPACITOR IN SHUNT RELATION TO A PORTION THEREOF, WHEREBY THE VOLTAGE DISTRIBUTION ALONG EACH NETWORK VARIES IN RESPONSE TO VARIATIONS IN APPLIED SIGNAL AMPLI-
Claim 2
Dependent Claim
153 words
A SIGNAL AMPLIFIER COMPRISING IN COMBINATION, A FIRST AND SECOND TRANSISTOR DEVICES EACH HAVING A BASE, AN EMITTER AND A COLLECTOR ELECTRODE, MEANS PROVIDING AN OUTPUT LOAD CIRCUIT FOR SAID AMPLIFIER, A SOURCE OF OPERATING CURRENT FOR SAID AMPLIFIER, MEANS FOR CONNECTING THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR DEVICE TO THE EMITTER ELECTRODE OF SAID SECOND TRANSISTOR DEVICE TO PROVIDE A DIRECT CURRENT AND SIGNAL TRANSFER PATH SO THAT THE CURRENT FLOW THROUGH SAID TRANSISTOR DEVICES INCREASES AND DECREASES IN UNISON, MEANS CONNECTING SAID OUTPUT LOAD CIRCUIT, SAID SOURCE OF OPERATING CURRENT AND SAID FIRST AND SECOND TRANSISTOR DEVICE IN SERIES, MEANS FOR APPLYING AN INPUT SIGNAL BETWEEN THE BASE AND EMITTER OF SAID FIRST TRANSISTOR DEVICE, BIASING MEANS FOR SAID SECOND TRANSISTOR DEVICE INCLUDING A VOLTAGE-STABILIZING CAPACITIVE ELEMENT, AND MEANS CONNECTING THE BASE OF SAID SECOND TRANSISTOR TO SAID BIASING MEANS AT A POINT REMOVED FROM SAID VOLTAGE STABILIZING CAPACITIVE ELEMENT.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |