Patent Number: 6,297,697

Title: Methods and apparatus for noise shaping a mixed signal power output

Abstract: A signal processing circuit and method for processing an input signal are described. The circuit includes a frequency selective network, an amplification stage, and at least one continuous-time feedback path from the output of the amplification stage to the frequency selective network. The amplification stage includes a switching amplifier and an analog amplifier. Switching circuitry alternately enables the switching and analog amplifiers for processing of the input signal.

Inventors: Delano; Cary L. (San Jose, CA), Tripathi; Adya S. (San Jose, CA)

Assignee: Tripath Technology

International Classification: H03F 3/20 (20060101); H03F 3/217 (20060101); H03F 3/72 (20060101); H03F 021/00 (); H03F 001/36 (); H03F 003/217 ()

Expiration Date: 10/02/2018