Adaptive feed-forward system

Details Adaptive feed-forward system Adaptive feed-forward system

1981-04-15

1983-06-21

Mullins, James B.

Amplifiers

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

330151, H03F 126

Patent

active

043896189

ABSTRACT:
A feed-forward system for reducing the distortion products from a device h as an amplifier, wherein a sample of the device input signal is subtractively combined with a sample of the device output signal to produce a sample of the distortion products. The distortion sample is adjusted in amplitude and phase and subtractively combined with the device output to produce a distortion-reduced system output. A synchronous detector correlates a sample of the system output, in which the proportion of distortion has been increased, with another sample of the distortion products to produce control signals for a modulator which adaptively adjusts the amplitude and phase of the distortion sample subtractively combined with the device output.

REFERENCES:
patent: 4130807 (1978-12-01), Hall et al.

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