公开(公告)号：US06853733B1

公开(公告)日：2005-02-08

申请号：US10465514

申请日：2003-06-18

申请人： Wouter Groothedde ,  Eric Antonius Maria Klumperink ,  Bram Nauta ,  Rudolphe Gustave Hubertus Eschauzier ,  Nico van Rijn

发明人： Wouter Groothedde ,  Eric Antonius Maria Klumperink ,  Bram Nauta ,  Rudolphe Gustave Hubertus Eschauzier ,  Nico van Rijn

IPC分类号： H04R1/00 ,  H04R1/10 ,  H04R3/00 ,  H04R19/01

CPC分类号： H04R1/005 ,  H04R3/00 ,  H04R19/016

摘要： A two-wire interface for a digital microphone circuit includes a power line and a ground line. The interface utilizes the ground line as a “voltage active line” to transmit both clock and data signals between the digital microphone circuit and a receiving circuit. The digital microphone circuit detects the clock signal on the voltage active line and uses the detected clock signal to operate an ADC to provide digital data. The digital data is used to selectively drive current back to the receiving circuit over the voltage active line. The receiving circuit detects the transmitted data by monitoring the voltage associated with a line termination. The impedance associated with the line termination is switched by the receiver circuit to modulate the clock signal on the voltage active line.

摘要翻译： 用于数字麦克风电路的双线接口包括电源线和接地线。 该接口利用地线作为“电压有源线”，在数字麦克风电路和接收电路之间传输时钟和数据信号。 数字麦克风电路检测电压有源线上的时钟信号，并使用检测到的时钟信号来操作ADC以提供数字数据。 数字数据用于通过电压有源线选择性地将电流驱动回接收电路。 接收电路通过监视与线路终端相关联的电压来检测发送的数据。 与线路终端相关的阻抗由接收机电路切换，以调制电压有效线路上的时钟信号。