公开(公告)号：WO2016065206A1

公开(公告)日：2016-04-28

申请号：PCT/US2015/057013

申请日：2015-10-22

Applicant: ESS TECHNOLOGY, INC.

Inventor： MALLINSON, A., Martin ,  FORMAN, Dustin, Dale ,  BLAIR, Robert, Lynn ,  FRITH, Peter, John

IPC: G06F13/28

CPC classification number: H04R1/1041 ,  H04M1/6058 ,  H04R5/04 ,  H04R2420/09

Abstract: An apparatus is disclosed for inputting digital data on the output channel(s) of an audio subsystem in an audio device, without interfering with normal operation of the audio subsystem. The described circuit includes a resistive element in parallel with the expected load device, such as a headphone or speaker. The resistive element receives a modulated digital signal from a data source or a switch, and the instantaneous current through the resistive element due to the modulated digital signal is reflected in a current feedback mechanism of the audio subsystem. Demodulation logic retrieves the digital signal from the current measured by the current feedback mechanism. A capacitor is provided to prevent the current in the resistive element from the digital signal from impacting the average DC current that the feedback mechanism uses to evaluate the load device.

Abstract translation: 公开了一种用于在音频设备中的音频子系统的输出通道上输入数字数据而不干扰音频子系统的正常操作的装置。 所描述的电路包括与期望的负载装置（例如耳机或扬声器）并联的电阻元件。 电阻元件从数据源或开关接收调制的数字信号，并且由于调制的数字信号引起的通过电阻元件的瞬时电流被反映在音频子系统的电流反馈机制中。 解调逻辑从当前反馈机制测量的电流中检索数字信号。 提供电容器以防止电阻元件中的电流数字信号影响反馈机构用于评估负载装置的平均DC电流。