Systems and methods for compensating for element nonlinearities in electronic circuits
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United States of America Patent
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Oct 22, 1985
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N/A
app pub date -
Jun 6, 1983
filing date -
Jun 6, 1983
priority date (Note) -
Expired
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Abstract
The distortion effects introduced in a complex multifrequency wave by parametric variations in individual active elements arising from signal and power supply variations in a circuit, such as an audio amplifier, are compensable through the use of replicas of the active elements, and the generation of a feedback signal incorporating comparable distortion. By high gain amplification of the feedback signal in a differential amplifier receiving an input signal that is not comparably distorted a comparison signal is derived containing distortion components. The comparison signal is used in a feedforward path which includes the circuit that is subjected to parametric variations in a sense to cancel the introduced distortions.
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