The system may measure many circuits high - frequency alternating current , direct current , frequency, efficiency of inverter .
系统测试项目有多路高频交流电流，直流电流，频率，逆变器的效率等。
In this paper, a method used to amplify faint direct current signal is put forward, and the circuits of direct current amplifier to realize the method are devised.
本文提出一种放大微弱直流信号的方法，同时设计了实现这一方法的直流放大器电路。
In this paper, a method used to amplify faint direct current signal is put forward, and the circuits of direct current amplifier to realize the method are devised.
本文提出一种放大微弱直流信号的方法，同时设计了实现这一方法的直流放大器电路。
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