一种回波抵消的相关电路及方法技术

本申请提供一种回波抵消的相关电路及方法，用以提高回波抵消效果。回波抵消电路中，第一电阻单元的一端、第四电阻单元的一端均接收第一差分信号，第二电阻单元的一端、第三电阻单元的一端均接收第二差分信号，第一电阻单元与第三电阻单元为阻值相同的定值电阻；第二电阻单元包括串联的第一定值电阻和第二定值电阻、第四电阻单元包括串联的第三定值电阻和第四定值电阻；可调电阻单元的一端连接于第一定值电阻与第二定值电阻之间、另一端连接于第三定值电阻与第四定值电阻之间，用于调节流经第二电阻单元的第二差分信号的幅值，以及调节流经第四电阻单元的第一差分信号的幅值；可调电阻单元还与可调电流源连接，用于接收可调电流源输出的电流。

An echo cancellation related circuit and method

The application provides an echo cancellation related circuit and method to improve the echo cancellation effect. The echo cancellation circuit, one end, fourth resistance unit of the first resistor units are receiving a first differential signal end, third resistance unit second resistance unit are receiving a second differential signal, a first resistor unit and the third unit is the same resistance resistance resistance value; the second unit includes a first series resistor the value of resistance and resistance value of second, fourth units including third series resistance value of the resistor and the fixed value resistance; end of the adjustable resistor unit connected to a certain value between the resistance and the second resistance value of the other end is connected to the third and the fourth fixed value resistor resistance value, for regulating flows through the second resistor unit second differential amplitude signal, and adjust the amplitude difference through the first signal of the fourth resistor unit; adjustable resistor unit with adjustable current source The connection is used to receive the current from the output of an adjustable current source.

【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请，说明书已公开。

【技术保护点】
PCT国内申请，权利要求书已公开。

【技术特征摘要】
【国外来华专利技术】PCT国内申请，...

【专利技术属性】
技术研发人员：湛永坚，赵治磊，
申请(专利权)人：华为技术有限公司，
类型：发明
国别省市：广东,44