Multiple power supply power amplifier circuit

Details Multiple power supply power amplifier circuit Multiple power supply power amplifier circuit

1984-11-08

1986-04-08

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330300, H03F 316

Patent

active

045815909

ABSTRACT:
An amplifier circuit with serially coupled output stages coupled to different level voltage supplies wherein at least the higher voltage-supplied output stages comprise a field effect transistor (FET) device is disclosed. In one embodiment a floating power supply is coupled between V.sub.in and the gate of the FET to provide turn on of the FET at the proper crossover voltage. In another embodiment, control of the FET is provided by a transistor circuit which causes the FET to turn on in response to the instantaneous voltage drop across the lower voltage-supplied output stage.

REFERENCES:
patent: 3753138 (1973-08-01), Svendsen
patent: 3772606 (1973-11-01), Waehner
patent: 3961280 (1976-06-01), Sampei
patent: 3974455 (1976-08-01), Kamimura et al.
patent: 4117418 (1978-09-01), Hoglund
patent: 4158179 (1979-06-01), Sakai et al.
patent: 4236120 (1980-11-01), White
patent: 4319199 (1982-03-01), Sunderland
patent: 4400652 (1983-08-01), Sunderland
International Electronics, McGraw-Hill, 11/9/78 entitled "X-Ray Lithography Breaking Through the Micron Line".

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