Feed-forward power amplifier system with adaptive control and co

Details Feed-forward power amplifier system with adaptive control and co Feed-forward power amplifier system with adaptive control and co

1994-07-28

1996-01-16

Mottola, Steven

Amplifiers

With amplifier bypass means

330 52, 330149, H03F 132, H03P 366

Patent

active

054851203

ABSTRACT:
An adaptive control system and method for use with a feed-forward linear amplifier, and in particular a multi-channel linear amplifier wherein a distortion (error) detection circuit is used for detecting a nonlinear distortion component of a main amplifier output for using in correcting distortion in amplifying an information signal. The distortion correction can be extracted from a pilot signal, an analysis of distortion from a channel-by-channel sweep or from analysis of selected target channels. Analysis can be based on a single signal, an average of many signals, or a selection of maxima of one or many signals. Subharmonic sampling may be used in analog to digital conversion of an IF signal to detect for distortion within a passband.

REFERENCES:
patent: 3922617 (1975-11-01), Denniston
patent: 4412185 (1983-10-01), Gerard
patent: 5157345 (1992-10-01), Kenington et al.

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