So-called bridge audio amplifier

Details So-called bridge audio amplifier So-called bridge audio amplifier

1988-04-12

1990-05-01

Mullins, James B.

Amplifiers

Signal feedback

Plural amplifier channels

330124R, 330146, H03F 368

Patent

active

049222074

ABSTRACT:
A so-called bridge audio amplifier, particularly for stereophonic car radio sets, comprises a first power amplifier in a non-inverting configuration which is connected to a second amplifier in an inverting configuration. This audio amplifier further comprises a first resistor pair forming a bridge circuit with the resistors of the first power amplifier, as well as a second resistor pair interconnected between a positive supply pole and ground and with the first and second amplifiers having their respective non-inverting inputs connected across the second resistor pair via respective input resistors. The audio amplifier of this invention requires but a very small number of input pins and may be used as a stereophonic amplifier.

REFERENCES:
patent: 4494077 (1985-01-01), Fukaya et al.
patent: 4539529 (1985-09-01), Lenz
patent: 4758796 (1988-07-01), Verhoeven et al.
Geiger, "50-W-Bruckenschaltung Mit NF-IS", Funkseham, vol. 49, No. 14, Jul. 1, 1977, pp. 639-642.
Henke, "Stereo-Nachbrenner Fur Das Autoradio", Funkscham, vol. 5, No. 19, Sep. 8, 1978, pp. 945-946.

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