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:
Feb. 28, 2012
Filed:
Mar. 06, 2009
Kazuhisa Kondo, Machida, JP;
Chung-hsien Tseng, Machida, JP;
Kazuhisa Kondo, Machida, JP;
Chung-Hsien Tseng, Machida, JP;
Kabushiki Kaisha Audio-Technica, Tokyo, JP;
Abstract
A condenser microphone comprising: a mic capsule in which a capacitor is composed of a diaphragm and a counter electrode, and which effects electroacoustic conversion; a FET for impedance-converting audio signals output from the mic capsule; and a CR circuit composed of a resistor and a capacitor, and connected to the FET to adjust a signal level in a low frequency range, and in the condenser microphone, an output terminal may be drawn out from a drain of the FET; and the CR circuit may be connected in between a source of the FET and the ground, furthermore, in the condenser microphone, there may be provided a changeover switch for switching a mode in which the CR circuit is connected in between the source of the FET and the ground into another mode in which the CR circuit is short-circuited to connect the source of the FET to the ground.