Patent Number: 6,166,603

Title: Class-ab output stages with improved distortion performance

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.

Inventors: Smith; Douglas L. (Tucson, AZ)

Assignee: Maxim Integrated Products, Inc.

International Classification: H03F 1/32 (20060101); H03F 3/30 (20060101); H03F 003/18 ()

Expiration Date: 12/26/2017