用以在受测装置中随目标电流来汇聚电流之系统与方法;SYSTEM AND METHOD FOR CONVERGING CURRENT WITH TARGET CURRENT IN DEVICE UNDER TEST

摘要

一种测试系统量测包括一电晶体之一受测装置(DUT)之参数。该测试系统包括：一第一电压源单元，其用于供应一闸极电压；一第二电压源单元，其用于供应一汲极电压或一源极电压中之一者，该第二电压源具有用于侦测分别流动通过该电晶体之一汲极电流或一源极电流中之一者的一电流量测装置；一回馈单元，其用于基于该汲极电流或该源极电流中之该一者来输出一回馈电流；以及一误差放大器，其用于基于该回馈电流与一目标电流值之比较来输出一回馈控制信号。该第一电压源单元基于该回馈控制信号来调整该闸极电压，使得该汲极电流或该源极电流中之该一者汇聚以匹配于该目标电流值。; a second voltage source unit for supplying one of a drain voltage or a source voltage, the second voltage source having a current measurement device for detecting one of a drain current or a source current flowing through the transistor, respectively; a feedback unit for outputting a feedback current, based on the one of the drain or source currents; and an error amplifier for outputting a feedback control signal, based on comparison of the feedback current and a target current value. The first voltage source unit adjusts the gate voltage based on the feedback control signal so that the one of the drain or source currents converges to match the target current value.