Class-D amplifier circuit

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United States of America Patent

PATENT NO 10367459
APP PUB NO 20180076781A1
SERIAL NO

15705868

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Abstract

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A bridge output stage is coupled to an electroacoustic conversion element via an inductor L. Driving circuits drive the output stage according to pulse signals S2H and S2L that correspond to an audio signal S1. An overcurrent detection circuit asserts an overcurrent detection signal S3L (i) when a current IML that flows through a transistor ML to be monitored that forms the output stage is continuously larger than a first threshold value for a first period of time or (ii) when the current IML that flows through the transistor ML to be monitored is larger than a second threshold value that is higher than the first threshold value after a predetermined second period of time elapses after the transistor ML to be monitored turns on.

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Patent Owner(s)

  • ROHM CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koyama, Yasuyuki Kyoto, JP 2 10

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