On -line testing system's driving source

The utility model discloses an on -line testing system's driving source, turn into discrete signal's driving voltage injection circuit and the response current test circuit who is used for receiving response current with continuous signal down including on -line testing system control, the discrete signal of driving voltage injection circuit output forms response current after passing through thecircuit -under -test in the circuit -under -test, response current input response current test circuit, and the response current test circuit acquisition is used for returning on -line testing system's test current. The utility model discloses the mathematical operation of the complicacy that on -line testing system's driving source had avoided bringing the continuous signal discretization can realize the synchronization of sampling and excitation simultaneously, has improved VI data acquisition system's performance. 本实用新型公开种在线测试系统的激励源，包括在线测试系统控制下将连续信号转化为离散信号的激励电压注入电路和用于接收响应电流的响应电流测试电路；激励电压注入电路输出的离散信号通过被测电路后，在被测电路中形成响