Nonlinear distortion compensation power amplifier
First Claim
1. A nonlinear distortion compensating power amplifier comprising:
- a power amplifier;
a distortion signal generation circuit which is placed on the input side of the power amplifier, and which generates a distortion signal according to an input signal to cancel out a nonlinear distortion of the power amplifier; and
a gain adjustment circuit which adjusts the overall gain so that the overall gain is constant.
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Abstract
A nonlinear distortion compensating power amplifier is provided with a gain adjustment circuit and performs gain adjustment control so that the overall gain of the entire system including a power amplifier is always maintained at a constant value. While this gain adjustment is being performed, a control circuit determines an optimum distortion amount pattern corresponding to instantaneous values of an input signal supplied to a distortion signal generation circuit to enable this circuit to generate a distortion signal such that the power of unnecessary out-of-band signal components in an output signal from the power amplifier is minimized.
29 Citations
11 Claims
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1. A nonlinear distortion compensating power amplifier comprising:
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a power amplifier;
a distortion signal generation circuit which is placed on the input side of the power amplifier, and which generates a distortion signal according to an input signal to cancel out a nonlinear distortion of the power amplifier; and
a gain adjustment circuit which adjusts the overall gain so that the overall gain is constant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification