Audio frequency power amplifier circuit

Details Audio frequency power amplifier circuit Audio frequency power amplifier circuit

1980-08-27

1982-08-17

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330264, H03F 330

Patent

active

043452159

ABSTRACT:
An audio frequency power amplifier circuit comprising a voltage detector for detecting the voltage between the gates of output MOS FETs in Class B push-pull connection, and a bias generator for applying a quiescent bias voltage to the MOS FETs. The bias voltages applied to the MOS FETs are changed in proportion to the output current in such a manner that the output MOS FET to be cut off is impressed with a substantially equal bias voltage in the absence of signal. In this way, the cut off of the push-pull transistor of Class B operation is prevented, thus preventing a switching distortion.

REFERENCES:
patent: 3995228 (1976-11-01), Pass

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