公开(公告)号：US20070269058A1

公开(公告)日：2007-11-22

申请号：US11749401

申请日：2007-05-16

Applicant: Hiroshi AKINO

Inventor： Hiroshi AKINO

IPC: H04R3/00

CPC classification number: H04R23/004 ,  H04R2410/00

Abstract: A microphone circuit includes an amplifier for amplifying an electric signal output from an electroacoustic transducing module, an external power supply circuit capable of supplying power for driving at least the amplifier from the outside, a light source that is turned on when an external power is supplied through the external power supply circuit, and a photo relay having contacts that are turned on and off in response to blinking of the light source. The contacts of the photo relay are connected so as to output an output signal of the amplifier as a microphone output when the light source is turned on and output an output signal of the electroacoustic transducing module as the microphone output when the light source is turned off.

Abstract translation: 麦克风电路包括用于放大从电声转换模块输出的电信号的放大器，能够从外部至少驱动放大器的电源的外部电源电路，当外部电源被供给时被接通的光源 通过外部电源电路和具有响应于光源的闪烁而导通和关断的触点的光电继电器。 连接光电继电器的触点，以在光源接通时输出放大器的输出信号作为麦克风输出，并且当光源关闭时输出电声转换模块的输出信号作为麦克风输出 。