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:
Sep. 11, 2007
Filed:
Nov. 10, 2004
Chung Dam Song, Seoul, KR;
Eek Joo Chung, Gimpo-si, KR;
Hyun Ho Kim, Incheon, KR;
BSE Co., Ltd., , KR;
Abstract
A surface mounted device (SMD) type biased condenser microphone includes two terminals for a surface mounting process. The SMD type biased condenser microphone includes a grounding terminal for connecting with an external circuit, a diaphragm/backplate set, one end of which is connected to the grounding terminal, for varying a capacity according to an intensity of sound pressure and converting sound into an electric signal, a DC-DC converter for providing a bias voltage so as to form an electrostatic field at one side of the diaphragm/backplate set, a buffer IC for amplifying the electric signal from the diaphragm/backplate set, and a decoupling capacitor for preventing the bias voltage output from the DC-DC converter from being directly applied to the buffer IC and transferring the electric signal from the diaphragm/backplate set to the buffer IC.