Patent Number: 6,166,596

Title: High efficiency power amplifying apparatus with phase compensation circuit

Abstract: A synchronously driven linear power amplifier (6) parallel to class D power amplifier (2) achieves an active filter equivalent, minimizing the scale of the passive filter (3), and effectively suppressing high frequency noise. Signal delay introduced by the passive filter (3) is also compensated by means of a phase compensation circuit (7) for phase compensating an audio signal applied from a signal input terminal (21).

Inventors: Higashiyama; Katsuhiko (Osaka-fu, JP), Sato; Tsuyoshi (Kyoto-fu, JP)

Assignee: Matsushita Electric Industrial Co., Ltd.

International Classification: H03F 1/02 (20060101); H03F 3/20 (20060101); H03F 3/217 (20060101); H03F 003/38 ()

Expiration Date: 12/26/2017