Method of removing distortions in amplifiers

Details Method of removing distortions in amplifiers Method of removing distortions in amplifiers

1983-05-25

1985-07-16

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330124R, H03F 126

Patent

active

045299455

ABSTRACT:
Method of removing distortions in amplifiers which includes forming a difference between a part of an input voltage and of an output voltage of an amplifier so that only the distortions remain, amplifying the difference voltage by means of another amplifier to a value equal to that of the distortion part in the output of the first-mentioned amplifier and then combining the output voltage of both amplifiers so that distortions in the sum voltage are mutually compensated, including supplying a given input power to a first amplifier and twice the given input power to a phase equalization element, the first amplifier delivering output power with distortions, coupling out part of the output power via a coupling branch having directional waveguide couplers and feeding the output power part, with like amplitude though opposite phase, via a phase shifter element as well as a damping element, while opening a blocking diode, to a branch formed of the phase equalization element and an auxiliary amplifier, taking part of the output power from a coupling branch for a parallel branch having a second amplifier and feeding it to the blocking diode of the coupling branch for the first amplifier for the purpose of blocking the coupling branch for the first amplifier, feeding the remaining output power of the coupling branch for the second amplifier to an output branch via the branch formed of the phase equalization element and the auxiliary amplifier so as to compensate for the distortions.

REFERENCES:
patent: 4208634 (1980-06-01), Peek et al.
patent: 4276514 (1981-06-01), Huang

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