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1. 发明授权

US06501401B2 Means for compensating a data-dependent supply current in an electronic circuit 有权
标题翻译：用于补偿电子电路中数据相关电源电流的装置
公开(公告)号：US06501401B2
公开(公告)日：2002-12-31
申请号：US09962649
申请日：2001-09-25
申请人： Jeroen Michiel Van Den Boom , Jan Roelof Westra , Quino Alexander Sandifort
发明人： Jeroen Michiel Van Den Boom , Jan Roelof Westra , Quino Alexander Sandifort
IPC分类号： H03M106
CPC分类号： H03M1/0678 , H03M1/742
摘要： Electronic circuitry comprising a data processing circuit for processing a digital signal (DS), such as a digital to analog converter (DAC), and a current compensation circuit (CMP). Both the digital to analog converter (DAC) and the current compensation circuit (CMP) are powered by a single power supply (U1). The current taken from the power supply (U1) by the digital to analog converter (DAC) is normally dependent on the digital input signal (DS). This would lead to distortion since the loss-resistances (R11, R12) which are always present in series with the power supply (U1) then feed a data-dependent supply voltage (U2) to the digital to analog converter (DAC). This problem is overcome by the addition of the current compensation circuit (CMP) which is coupled for receiving the digital signal (DS). The current compensation circuit (CMP) is arranged in such a way that the sum of the data-dependent current drawn by the digital to analog converter (DAC) and the data-dependent current drawn by the compensation circuit (CMP) is substantially independent of the data.
摘要翻译：电子电路包括用于处理数字信号（DS）的数据处理电路，例如数模转换器（DAC）和电流补偿电路（CMP）。数模转换器（DAC）和电流补偿电路（CMP）由单个电源（U1）供电。通过数模转换器（DAC）从电源（U1）获取的电流通常取决于数字输入信号（DS）。这将导致失真，因为始终与电源（U1）串联存在的损耗电阻（R11，R12）然后将数据相关电源电压（U2）馈送到数模转换器（DAC）。通过添加用于接收数字信号（DS）的电流补偿电路（CMP）来克服该问题。电流补偿电路（CMP）被布置成使得由数模转换器（DAC）汲取的与数据相关的电流之和与由补偿电路（CMP）汲取的与数据相关的电流之和基本上独立于数据。

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