Speaker control device and speaker control method

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United States of America Patent

PATENT NO 9973850
SERIAL NO

15003146

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Abstract

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A speaker control device in one embodiment includes an oscillator connected in parallel with a drive circuit for driving a speaker, the oscillator changing an oscillation frequency according to a voltage, and a control circuit detecting a variation in the oscillation frequency of the oscillator, and adjusting an amount of current supplied to the speaker by the drive circuit in the case where a variation in the voltage exceeds an allowable value.

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Patent Owner(s)

Patent OwnerAddress
TRIGENCE SEMICONDUCTOR INC4-6-13-404 KUDANMINAMI CHIYODA-KU TOKYO 1020074

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Okamura, Jun-ichi Tokyo, JP 31 437
Yasuda, Akira Tokyo, JP 100 1987

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