Patent Number: 6,528,975

Title: Saturation prevention and amplifier distortion reduction

Abstract: The present invention, generally speaking, provides methods and apparatus for avoiding saturation of a transistor, with particular application to communications signal amplifiers. In accordance with one aspect of the invention, feedback circuitry is provided to control a transistor in accordance with a control signal. The combination of current monitor and a threshold comparator detects when the base current of the transistor exceeds a threshold, indicative of the onset of saturation. Feedback control is then modified to prevent saturation.

Inventors: Sander; Wendell B. (Los Gatos, CA)

Assignee: Tropian Inc.

International Classification: H03F 1/32 (20060101); H03F 1/34 (20060101); G05F 001/40 (); H04B 001/04 ()

Expiration Date: 03/04/2020