XWD1系列小型自动电位差计普遍使用在化工、冶金、电力等部门来测量温度、压力、流量等热力参数。这些非电量转换成的电量是一种变化缓慢的微弱信号,要达到正确的指示、记录、控制和调制等作用,必要的手段是对该信号进行调制放大。目前XWD1型电位差计普遍采用的是机械振动调制器(见图1)。它的调制效果较差,寿命也较短。我们用两块集成块试制了一种集成电路调制器(见图2)代替机械调制器, XWD1 series of small automatic potentiometer commonly used in chemical, metallurgical, electric power and other departments to measure temperature, pressure, flow and other thermal parameters. These non-electric power into electricity is a slowly changing weak signal, to achieve the correct instructions, recording, control and modulation and so on, the necessary means is to modulate the signal amplification. Currently XWD1 potentiometer commonly used is a mechanical vibration modulator (see Figure 1). Its poor modulation effect, shorter life expectancy. We used a two integrated block trial of an integrated circuit modulator (see Figure 2) instead of mechanical modulator,