The experiment shows that if the current amplifier factor is big, Junction J_3 is hard and the ineffective trigger branch current is low, the turn-on time can be shorten effectively.

实验结果指出，器件的电流放大系数器件大j、3结特性硬，无效触发分流小，可有效地缩短开通时间。

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The traditional power meter calibrating system usually has the shortcomings of low efficiency and large volume due to its standard voltage and current source rely on the analog amplifier.

传统的电力校表台由模拟功放向待校电表及标准表提供校表电流，造成系统效率低、体积大、重量重。

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An OPA128 operational amplifier with extreme low bias current and big gain is adopted for enhancing the response to weak signals.

同时为了保证测量精度，采用偏置电流极低的运算放大器opa128，并且增大了反馈电阻，以增强对弱信号的响应。

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