Power amplifier

Details Power amplifier Power amplifier

1981-01-05

1983-04-12

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including protection means

330207P, H03F 304

Patent

active

043799973

ABSTRACT:
A power amplifier which has a muting circuit bringing the power amplifier into a muting condition when an excessively large input signal is applied. The power amplifier comprises a preamplifying stage and a power amplifying stage. The preamplifying stage includes at least one transistor for driving the power amplifying stage. The collector of the transistor is coupled to one power source terminal. The emitter of the transistor is coupled to the other power source terminal through an electronic switch, and to the first power source terminal through a resistor. The electronic switch selectively connects the emitter of the transistor to one of the power source terminals.

REFERENCES:
patent: 3735203 (1973-05-01), Fujie et al.
patent: 4288755 (1981-09-01), Sakai
"Einfache elektronische Oberlastsicherung fur Transistor-Gegentaktverstarker" Funkschau 1971, p. 184.
1,168,973 Transistor amplifier stage, C: Electricity, Electronics, Communications-p. 2, German 30.4.64, vol. 4, No. 22.

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