Amplifier comprising a first and a second amplifier element

Details Amplifier comprising a first and a second amplifier element Amplifier comprising a first and a second amplifier element

1980-06-02

1982-03-23

Mullins, James B.

Amplifiers

Signal feedback

At least one push-pull signal stage

330 84, 330105, 330151, 330265, 330293, 330295, H03F 134

Patent

active

043215521

ABSTRACT:
An amplifier comprising a first and a second amplifier element, whose outputs are connected to a load, a difference circuit which comprises a comparator, in which the output signal of the first amplifier element is compated with the input signal thereof to produce a correction signal which is applied to second amplifier element, and a second substantially identical difference circuit which comprises a comparator in which the output signal of the second amplifier element is compared with the input signal thereof to produce a correction signal which is applied to the first amplifier element; a desired signal to be amplified being applied to both amplifier elements. The two amplifier elements, which may be preceded by preamplifiers, take the form of power amplifiers. Because the distortion signals appear at the load as "common mode" signals, the overall distortion becomes substantially zero in the case of equal attentuation in the two difference circuits. The power amplifiers may be provided with a voltage output as well as a current output.

REFERENCES:
patent: 3693109 (1972-09-01), Swerdlow
patent: 4088961 (1978-05-01), Ashley

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