SOUND DETECTING CIRCUIT AND AMPLIFIER CIRCUIT THEREOF

Disclosed is a sound detecting circuit which includes a sensing unit configured to generate an AC signal in response to a sound pressure level of a sound signal; an amplification unit configured to amplify the AC signal; and a bias voltage generating unit configured to generate a bias voltage to be...

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Bibliographic Details
Main Authors ROH TAE MOON, CHO MIN-HYUNG, KIM YI-GYEONG, KWON JONG-KEE, KIM JONGDAE, YANG WOO SEOK
Format Patent
LanguageEnglish
Published 25.04.2013
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Summary:Disclosed is a sound detecting circuit which includes a sensing unit configured to generate an AC signal in response to a sound pressure level of a sound signal; an amplification unit configured to amplify the AC signal; and a bias voltage generating unit configured to generate a bias voltage to be provided to the amplification unit. The bias voltage generating unit comprises a current source configured to provide a power current; and a current-voltage converting circuit configured to convert the power current into the bias voltage and to reduce a noise due to the power current.
Bibliography:Application Number: US201213531437