公开(公告)号：US20090232335A1

公开(公告)日：2009-09-17

申请号：US12399630

申请日：2009-03-06

申请人： Kazuhisa KONDO ,  Chung-Hsien TSENG

发明人： Kazuhisa KONDO ,  Chung-Hsien TSENG

IPC分类号： H04R11/04

CPC分类号： H04R1/04 ,  H04R3/06 ,  H04R2410/07

摘要： 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.

摘要翻译： 一种电容式麦克风，包括：麦克风胶囊，其中电容器由隔膜和对电极组成，并且其实现电声转换; 用于阻抗转换从麦克风胶囊输出的音频信号的FET; 以及由电阻器和电容器组成的CR电路，并且连接到FET以调节低频范围内的信号电平，并且在电容式麦克风中，输出端子可以从FET的漏极引出; 并且CR电路可以连接在FET的源极和地之间，此外，在电容式麦克风中，可以提供切换开关，用于切换其中CR电路连接在FET的源极之间的模式 并将接地切换成CR电路短路以将FET的源极连接到地的另一模式。