Process for compensating nonlinearities in an amplifier circuit

Details Process for compensating nonlinearities in an amplifier circuit Process for compensating nonlinearities in an amplifier circuit

1991-07-11

1992-11-17

Laroche, Eugene R.

Amplifiers

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

328163, 455 63, H03F 132

Patent

active

051646781

ABSTRACT:
A process for compensating nonlinearities in an amplifier circuit. An input signal s(t) is amplified to form an output signal y(t) using an amplifier circuit subject to nonlinearities. In accordance with the invention, a predistortion filter is connected upstream of the amplifier circuit. An aggregate signal ##EQU1## is formed in said filter from the input signal s(t) and a predistorted signal x(t) fed back from the output of the predistortion filter, and integrated with respect to time. The predistorted signal x(t) is fed to the amplifier circuit subject to nonlinearities. In this case, the prescribed number n+1 of coefficients k.sub.0, . . . , K.sub.n is determined in accordance with the model ##EQU2## so that for a given input signal x(t) of the amplifier circuit the output signal determined in accordance with the model is essentially identical with the output signal y(t) of the amplifier circuit.

REFERENCES:
patent: 4701717 (1987-10-01), Radermacher et al.
patent: 4870371 (1989-09-01), Gottwald et al.
patent: 4967164 (1990-10-01), Sari
patent: 5049832 (1991-09-01), Cavers
Patent Abstracts of Japan, vol. 7, No. 208, (E-198) (1353), Sep. 14, 1983; & JP-A-58105658 (Nippon Denki) Jun. 23, 1983.

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