Low-frequency power amplifier, in particular of the integrated t

Details Low-frequency power amplifier, in particular of the integrated t Low-frequency power amplifier, in particular of the integrated t

1987-02-17

1988-11-22

Mullins, James B.

Amplifiers

Signal feedback

Plural amplifier channels

330124R, 330295, H03F 134

Patent

active

047868783

ABSTRACT:
The low-frequency integrated amplifier comprises a voltage amplifier stage and two power amplifier stages including power amplifier means driven by the voltage amplifier stage and fedback by means of a respective feedback network dimensioned so that, at the frequency at which the phase shift of the power stages exceeds 180.degree., the open loop gain thereof is less than 0 dB, so as to prevent, for any kind of load and for every output voltage, any oscillation of said stages, and ensure the absolute stability of the system.

REFERENCES:
patent: 4068187 (1978-01-01), Amada et al.
patent: 4146845 (1979-03-01), Lunquist
Cherry, "A High Quality Audio Power Amplifier", Monitor-Proceedings of the IREE Aust., vol. 39, No. 1, Jan/Feb. 1978, pp. 1-8.

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