Bias adjustment responsive to signal power

Details Bias adjustment responsive to signal power Bias adjustment responsive to signal power

1979-11-30

1982-02-23

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

455127, H03F 324

Patent

active

043170838

ABSTRACT:
A distortion correction arrangement for a power amplifier which uses transistors is described. Biasing circuits are coupled to the transistor for biasing a transistor into a low-distortion conduction condition. The conduction condition of the transistor changes in response to the signal power being handled. Changes in signal power may therefore change the conduction condition to one of higher distortion. Bias control circuits are coupled to the transistor and to the bias circuit for controlling the bias in response to the signal power being handled. In a particular embodiment of the invention, the bias control circuits additionally respond to the rate of change of the signal power.

REFERENCES:
patent: 3443241 (1969-05-01), Pitzalis, Jr.
patent: 3497822 (1970-02-01), Beurrier
patent: 3714601 (1973-01-01), Minton et al.

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