Power amplifier circuit

Details Power amplifier circuit Power amplifier circuit

H - Electricity

03

F

330/41

H03F 1/02 (2006.01) H03F 3/16 (2006.01)

Patent

CA 1229387

ABSTRACT IMPROVED POWER AMPLIFIER CIRCUIT 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 Vin 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.

494931

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