The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 2015
Filed:
Jun. 22, 2012
Yi-gyeong Kim, Daejeon, KR;
Min-hyung Cho, Daejeon, KR;
Tae Moon Roh, Daejeon, KR;
Jong-kee Kwon, Daejeon, KR;
Woo Seok Yang, Daejeon, KR;
Jongdae Kim, Daejeon, KR;
Yi-Gyeong Kim, Daejeon, KR;
Min-Hyung Cho, Daejeon, KR;
Tae Moon Roh, Daejeon, KR;
Jong-Kee Kwon, Daejeon, KR;
Woo Seok Yang, Daejeon, KR;
Jongdae Kim, Daejeon, KR;
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon, KR;
Abstract
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.