Power amplifier circuit

Details Power amplifier circuit Power amplifier circuit

1977-02-08

1978-07-04

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including protection means

330207P, 330267, 330296, H03F 304

Patent

active

040991393

ABSTRACT:
A power amplifier circuit comprising a voltage amplifier stage and a current amplifier stage, the mode of bias of which can be changed over between class A and class B (AB). The supply voltage for the current amplifier stage is changed over by a mode selection switch. The change in the supply voltage is detected to select the bias voltage for the current amplifier stage.
The possibility of applying a class A bias to the current amplifier stage supplied with a class B line voltage is thus completely removed.

REFERENCES:
patent: 3553599 (1971-01-01), Hayamizu
patent: 3896393 (1975-07-01), Cave et al.

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