Current feedback audio power amplifier

Details Current feedback audio power amplifier Current feedback audio power amplifier

1990-05-22

1992-03-17

Mullins, James B.

Amplifiers

With plural amplifier channels

Amplifying different frequencies in different channels

330255, 330257, 330260, 330295, H03F 368

Patent

active

050972235

ABSTRACT:
An audio power amplifier achieves a closed-loop bandwidth which is relatively independent of gain, and a very high slew rate capability, with a current feedback operational amplifier design. A separate operational amplifier which is connected as an integrator and operates at sub-audio frequencies compensates for the output terminal bias current of the first operational amplifier, thus mitigating the effects of current mirror mismatch in the current feedback circuit and allowing the overall output offset voltage to be significantly reduced.

REFERENCES:
patent: 3846710 (1974-11-01), Chapman
patent: 4555672 (1985-11-01), Segan

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