仪器中设计了大电流低频交流恒流源，高灵敏度前置放大器，并用单片机软件代替了大量电子线路的功能。

We designed a large current AC constant current source of low frequency, and an electronic preamplifier with high sensitivity for the use of the instrument.

youdao

仪器中设计了大电流低频交流恒流源，高灵敏度前置放大器，并用单片机软件代替了大量电子线路的功能。

We designed a large current AC constant current source of low frequency, and an electronic preamplifier with high sensitivity for the use of the instrument.

youdao