Adaptive feedforward cancellation technique that is effective in

Details Adaptive feedforward cancellation technique that is effective in Adaptive feedforward cancellation technique that is effective in

1984-09-04

1985-12-24

Mullins, James B.

Amplifiers

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

328163, 330151, 455 63, 455303, H03F 126

Patent

active

045609454

ABSTRACT:
An improved feedforward cancellation amplifier is disclosed, characterized by the arrangement of an adaptive cancellation modulator for each fundamental input signal at the input of a power bank amplifier. With such an arrangement, phase and amplitude modulation for adaptive cancellation of each fundamental signal is performed in the power amplification path of the feedforward canceller. Accordingly, the harmonics produced by the modulators for each fundamental signal are cancelled in the output of the power bank amplifier and the signal levels at the input to the power bank amplifier are less than those in the input sample path of the canceller.

REFERENCES:
patent: 4389618 (1983-06-01), Bauman

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