在当前这个CD、VCD和MP3的时代中,模拟音频电子产品的发展似乎进入停顿时期,传统的前置放大器的功能已经降低为信号分配和音量调整作用。本文介绍一种取代传统音量控制装置,具有数字遥控能力的前置放大器电路。能够以极高的精确度和尽可能小的失真度完成立体声信号在各通道中的分配和音量调整功能。并且可以通过常用的RC5类红外遥控器加以控制, In the current era of CDs, VCDs and MP3s, the development of analog audio electronics seems to be at a standstill, and the functionality of traditional preamplifiers has been reduced to signal distribution and volume adjustment. This article presents a preamplifier circuit that replaces the traditional volume control with digital remote control. Allows the distribution and volume adjustment of stereo signals in each channel with extremely high accuracy and with as little distortion as possible. And can be controlled by the commonly used RC5 type infrared remote control,