As to controlling system, the four-channel signals from MCU are output to DC amplifier to be amplified and then loaded to PZT platform.
系统控制方面，通过单片机系统产生四路信号，经驱动电源直流放大后加载到压电陶瓷微位移器上。
This paper lays stress on the description of the three main features of KD1411: 1. the design of weak signal DC amplifier with programmable gain;
本文重点介绍了KD1411的以下三个主要特点：（1）增益可编程控制的微弱信号放大器的设计；
Experimental results indicate that, the DC amplifier is similar to YM3891DC amplifier functionally, but cheaper and more practical than the latter.
实验证明这种直流放大器与YM 3891型直流放大器效果相近，是一种价廉、实用的直流放大器。
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