Ultra-linear feedforward amplifier with adaptive control and met

Details Ultra-linear feedforward amplifier with adaptive control and met Ultra-linear feedforward amplifier with adaptive control and met

1995-04-14

1997-01-14

Mottola, Steven

Amplifiers

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

330151, H03F 126

Patent

active

055943853

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. 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: 3922617 (1975-11-01), Denniston et al.
patent: 4412185 (1983-10-01), Gerard
patent: 5119040 (1992-06-01), Long et al.
patent: 5386198 (1995-01-01), Ripstrand et al.

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