The most important effect of this is to make the overall amplifier gain almost immune to changes in the amplifier unit gain, and dependent almost entirely on the feedback network components.

负反馈的最重要作用在于使放大器总增益不至于因基本放大器增益的改变而变化，其总增益的大小完全取决于反馈网络的元件参数。

youdao

The temperature information acquisition unit based on C8051F330 is composed of processor, analog front-end operational amplifier, serial port communications and so on.

基于C8051F330的温度信息采集器，由处理器、模拟前端运算放大器和串口通讯等组成。

youdao

While it had excellent sound quality, the low efficiency of the power amplifier unit made commercialization difficult.

尽管它有非常出色的音质，但是由于功率利用率低的问题，商业化是比较困难的。

youdao

In order to fully exploit the sound potential of the HDVD 800 with any audio source, a rotary gain switch at the rear of the unit provides simple adaptation of the amplifier output to the audio input voltage.

ENGADGET: Sennheiser unveils HDVA 600 analog headphone amp, asks for $1,600