Automatic bias adjusting circuit

Details Automatic bias adjusting circuit Automatic bias adjusting circuit

1979-05-03

1980-12-02

Dixon, Harold A.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330270, 330273, H03F 318

Patent

active

042374251

ABSTRACT:
A bias adjusting circuit for a push-pull amplifier is disclosed, which automatically increases or decreases the bias in the amplifier circuit so that the desired bias level is maintained. The bias adjusting circuit measures the current consumption of both halves of the push-pull amplifier, determines the point at which output current zero crossings have occurred, and at these times makes any necessary changes to the bias current to conform to a desired level. The circuit has an insignificant effect on the amplifier's power efficiency, and offers a degree of bias stability unattainable with conventional techniques.

REFERENCES:
patent: 3223933 (1965-12-01), LaFond et al.
patent: 3531728 (1970-09-01), Visher

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