Predistorter

Details Predistorter Predistorter

2008-12-17

2011-10-18

Choe, Henry (Department: 2817)

Amplifiers

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

C375S297000

Reexamination Certificate

active

08040182

ABSTRACT:
Provided is a predistorter which compensates for a memory effect occurring in an amplifier used in a communication device, especially an electric memory effect as well. The predistorter includes: a distortion compensation circuit (8) for compensating for a nonlinear distortion caused by an amplifier (3), in which the distortion compensation circuit outputs a predistortion signal to be input to the amplifier. The predistorter includes: first filter section (21) which is connected between the distortion compensation circuit and the amplifier, for compensating for a frequency characteristic appearing in a signal component occurring in an entire analog circuit including the amplifier; and second filter section (22) which is connected between the distortion compensation circuit and the first filter section or between the first filter section and the amplifier, for compensating for a frequency characteristic appearing in a distortion component occurring in the amplifier.

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Supplementary Search Report issued on Jan. 26, 2011, in European Patent Application No. 08870915.9-1233/2244380.

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