测量放大器的制作

Manufacture of measuring amplifier

根据设计要求， 本着简单实用的原则采用高阻测量放大器作为主放大器； 并采取十进制码盘进行放大器放大倍数的预置； 同时自行设计信号变换电路进行信号的转换。

According to the principle of simple and practable design,we use the meterage magnifier and decimal numeration system dial switch to set up the A VD .We design a circuitry to convert the input signal.In the electrical source power supply part we use the twi steady power supply circuitry to make voltage steady.