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。

公开(公告)号：WO2013067465A1

公开(公告)日：2013-05-10

申请号：PCT/US2012/063468

申请日：2012-11-03

Applicant: ESS TECHNOLOGY, INC.

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

IPC: H04B1/10

CPC classification number: H03D7/18 ,  H03D7/165 ,  H03D2200/0062 ,  H03D2200/0068 ,  H03D2200/0072

Abstract: A method and system is disclosed tor designing a radio for down- converting RF signals to IF signals by sampling the signals in a round-robin sampling circuit and multiplying the samples by coefficients that are changed at a fixed rate equal to the rate of operation of each of the sampling circuits. The circuit is able to down-convert multiple channels simultaneously to adjacent positions in the IF band,, while rejecting unwanted image signals. The method and system avoids the difficulty and cost of directly digitizing the RF signal, allowing each component to operate at a greatly reduced speed. The coefficients are selected to provide the desired transfer function while keeping the output signal centered at a desired frequency.

Abstract translation: 公开了一种方法和系统，其设计用于通过对循环抽样电路中的信号进行采样来将RF信号下变频到IF信号的无线电装置，并将样本乘以以等于 每个采样电路。 该电路能够将多个信道同时下变频到IF频带中的相邻位置，同时拒绝不需要的图像信号。 该方法和系统避免了直接数字化RF信号的困难和成本，从而允许每个组件以大大降低的速度运行。 选择系数以提供期望的传递函数，同时将输出信号保持在期望频率的中心。