Class-ab output stages with improved distortion performance

Details Class-ab output stages with improved distortion performance Class-ab output stages with improved distortion performance

1998-12-02

2000-12-26

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330267, H03F 318

Patent

active

061666033

ABSTRACT:
The present invention teaches output stages having distortion performance improved relative to prior art class-AB output stage distortion performance. The general concept is to constantly bias the feed-forward circuitry of the output stage into a low-distortion operating state. This can be done through several different methods, each of which has its own particular circuit requirements. For example, in one embodiment the bias circuitry generates a near constant bias current suitable for forcing the feed-forward circuitry into a low-distortion operating state regardless of the output stage output value.

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