Cancellation loop, for a feed-forward amplifier, employing an ad

Details Cancellation loop, for a feed-forward amplifier, employing an ad Cancellation loop, for a feed-forward amplifier, employing an ad

1995-07-14

1997-03-11

Mottola, Steven

Amplifiers

With pilot frequency control means

330151, H03F 366, H03F 126

Patent

active

056105541

ABSTRACT:
An adaptive control system and method is provided in a feed-forward linear amplifier, and in particular a multi-channel linear amplifier, wherein analyzed distortion or error detection of nonlinear distortion components of the output signal of a main amplifier element is used to correct distortion in amplification of an information signal using a two-stage distortion correction circuit. Analysis of the distortion is based on a sweep of the entire operating frequency band from which the distortion components are extracted. I.F. sampling (sub-harmonic sampling) may be used in analog-to-digital conversion of an I.F. signal to detect the distortion within a pass-band.

REFERENCES:
patent: 5119040 (1992-06-01), Long et al.
patent: 5166634 (1992-11-01), Narahashi et al.
patent: 5386198 (1995-01-01), Ripstrand et al.

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