公开(公告)号：US20080144846A1

公开(公告)日：2008-06-19

申请号：US11641552

申请日：2006-12-18

申请人： Nelson R. Sollenberger ,  Hongwei Kong ,  Andy Ye Tong ,  Todd L. Brooks

发明人： Nelson R. Sollenberger ,  Hongwei Kong ,  Andy Ye Tong ,  Todd L. Brooks

IPC分类号： H04R29/00

CPC分类号： H04R29/00

摘要： A circuit for detecting when a microphone is connected to a microphone coupling includes a detection signal generator that asserts a microphone detection signal. A microphone power module supplies a microphone current to the microphone coupling in response to the assertion of the microphone detection signal. A microphone detection module detects when the microphone is not connected to the microphone coupling based on an impedance of the microphone coupling, wherein the microphone power module disconnects the microphone current from the microphone coupling when the microphone is not connected to the microphone coupling. In an embodiment, the circuit further detects when a microphone button is depressed.

摘要翻译： 用于检测麦克风何时连接到麦克风耦合的电路包括断言麦克风检测信号的检测信号发生器。 麦克风电源模块响应于麦克风检测信号的断言向麦克风耦合提供麦克风电流。 麦克风检测模块基于麦克风耦合的阻抗来检测麦克风何时未连接到麦克风耦合，其中当麦克风未连接到麦克风耦合器时，麦克风功率模块将麦克风电流与麦克风耦合断开。 在一个实施例中，电路还检测何时按下麦克风按钮。