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图１的电路是一种用微控制器产生 和测量模拟电压的廉价方法。它使用大多数微控制器都具备的输出比较和输出定时器功能。它可提供２个模拟输出和２个模拟输入，分辨率达１６位，售价不到６美元，低于单一ＤＡＣ的售价。它的主要应用领域是微处理器控制的台式电源。整个电路是
The circuit of Figure 1 is an inexpensive way to generate and measure analog voltages with a microcontroller. It uses the output compare and output timer features that most microcontrollers have. It offers 2 analog outputs and 2 analog inputs with 16-bit resolution for less than $ 6, below the price of a single DAC. Its main area of application is microprocessor controlled desktop power. The whole circuit is