数字电位器在测量放大器中的应用

Application of the digital potentiometer in the measuring amplifier

在简要介绍了I2C总线数字电位器X9221的工作原理的基础上，结合可程控增益放大器AD625，设计了一个由单片机软件编程控制适合于多量程范围的测量放大器。

：Based on the brief introduction of the operating principle of the I2C bus digital potentiometer X9221 and the programmable gain amplifier AD625 this paper designs a large scale measuring amplifier controlled by monolithic computer software．