Amplifier system switchable between two amplifying operations

Details Amplifier system switchable between two amplifying operations Amplifier system switchable between two amplifying operations

1982-12-02

1985-01-15

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

330124R, H03F 368

Patent

active

044940777

ABSTRACT:
An amplifier switchable between a dual-channel amplifier and a BTL amplifier includes first and second amplifying circuits having a non-inverting input, an inverting input and an output, a first input terminal receiving a first input signal and applying it to the non-inverting input of the first amplifying circuit, a second input terminal receiving a second input signal, a first switch selectively applying a signal to the non-inverting input of the first or second amplifying circuit, a second switch controlling the application of an output from the first amplifying circuit to the inverting input of the second amplifying circuit, a controlling circuit controlling the first and second switches, first through third loads and a third switch controlling the application of an output from the first and second amplifying circuits to the first and second loads, respectively, or to the respective ends of the third load.

REFERENCES:
patent: 4079333 (1978-03-01), Yamada

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