Amplifiers – Signal feedback – Combined with control of bias voltage of signal amplifier
Patent
1975-03-27
1977-06-21
Claffy, Kathleen H.
Amplifiers
Signal feedback
Combined with control of bias voltage of signal amplifier
330 13, H03F 134
Patent
active
RE0292737
ABSTRACT:
A transistor power amplifier is provided with direct-current-coupling between stages and to the loudspeaker. The output stage is push-pull single-ended and includes two transistors connected in series at a midpoint of the stage. A split power supply has a center-tap connected to one output terminal and the other output terminal is connected to said output stage midpoint. Amplification and drive stages are direct-current-coupled in cascade to the output stage. A direct-current negative feedback network extends from the output stage to an amplification stage to maintain the output terminals at substantially the same quiescent potential to prevent direct-current flow through the voice-coil of the loudspeaker.
REFERENCES:
tobey & Dinsdale, "Transistor Audio Power Amplifier", Wireless World, Nov. 1961, pp. 565-570.
Tobey & Dinsdale, "Transistor Audio Power Amplifier", Wireless World, Feb. 1962, pp. 69-70.
Faran & Fulks, "High Impedance Drive for Elimination of Crossover Distortion", IRE Transactions on Audio, July-Aug. 1962, pp. 99-105.
D. W. Slaughter, "Feedback-Stabilized Transistor Amplifier", Electronics, May 1955, pp. 174, 175.
Robert S. Burwen, "A Transistorized 200-Watt Stereo Amplifier", Audio, Nov. 1962, pp. 40-52.
Brigance Gerald L.
Claffy Kathleen H.
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