Class-D audio amplifier

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United States of America Patent

PATENT NO 9955257
SERIAL NO

15240341

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Abstract

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The present disclosure relates to a class-D audio amplifier. When the class-D audio amplifier is powered on, an auxiliary power amplifier and an auxiliary feedback circuit constitute an auxiliary close loop so that a control loop is established in advance. The auxiliary close loop is disconnected after various circuit modules reach their steady operation points, and the class-D audio amplifier operates at a normal state. A soft start circuit is provided for suppressing noise which occurs when the class-D audio amplifier is powered on. Thus, the class-D audio amplifier suppresses POP noise at an output terminal when the class-D audio amplifier is powered on.

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Patent Owner(s)

Patent OwnerAddress
NANJING SILERGY SEMICONDUCTOR (HONG KONG) TECHNOLOGY LTDUNIT 701 7/F CITICORP CENTRE 18 WHITFIELD ROAD CAUSEWAY BAY 999077

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cao, Hejinsheng Hangzhou, CN 9 33
Sun, Zhenguo Hangzhou, CN 2 28
Wu, Qichang Hangzhou, CN 5 19
Zhu, Huaping Hangzhou, CN 5 10

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