基于数字电位器的程控放大器设计

Design of Programmable Gain Amplifier Based on Digitally Controlled Potentiometer

叙述了一种采用非易失性数字电位器的程控放大器的基本原理,提出了一种获得廉价、高性能、多档位、无触点程控放大器的新方法,给出了该放大器与Inte8051系列单片机的软件接口程序,同时指出了使用该原理实现的程控放大器的几个注意事项和数字电位器的选择原则。

This paper discusses a basic element of programmable gain amplifier which uses nonvolatile digitally controlled potentiometer. Gives a new means for programmable gain amplifier with low cost, high capability, more choose and non touch. Gives a program use in Intel 8051 singlechip to control it. Then gives some notices for using the programmable gain amplifier and some principiaes for choosing digitally controlled potentiometer.