Predistorter

Details Predistorter Predistorter

2007-01-30

2007-01-30

Nguyen, Patricia (Department: 2817)

Amplifiers

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

C330S291000, C330S278000

Reexamination Certificate

active

11073694

ABSTRACT:
To provide a predistorter compensating for distortion generated at an amplifier by inputting a signal to be inputted to the amplifier constituting an object of compensating for the distortion and previously providing the distortion to the input signal. Amplifier replica means is provided with an input/output characteristic the same as an input/output characteristic of an amplifier or an input/output characteristic approximated thereto and inputs a signal to output. Difference detecting means detects a difference between an input signal to a predistorter and an output signal from the amplifier replica means. Amplifier replica input signal changing means changes a signal inputted to the amplifier replica means such that the difference detected by the difference detecting means is reduced. Change signal outputting means outputs a signal changed by the amplifier replica input signal changing means to the amplifier.

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patent: 98/28888 (1998-07-01), None

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