许多小型而廉价的8位μP(微处理器),在芯片上的模/数据转换器(ADC)很适合用于多种设备。举例来说:如果电阻式位置传感器的输出精度能够稍微提高一点,这对某些使用场合就很有利。图1所示的电阻式电路在μP上使用了两个ADC引脚,便可把电阻式位置传感器的输出精度提高1倍。这样作的结果,就是把8位ADC变成了9位ADC 图1所示电路的电阻性电路部分,其成本不过3美元:如果采用精密电位器来作位置传感器,本电路的成本将稍高些。 Many small and inexpensive 8-bit μP (microprocessor), on-chip analog-to-digital converter (ADC) is very suitable for a variety of devices. For example: If the output resistance of the resistive position sensor can be slightly higher, this is good for some applications. The resistive circuit shown in Figure 1 uses two ADC pins on μP, doubling the output accuracy of a resistive position sensor. The result of this was to turn the 8-bit ADC into a resistive part of the circuit shown in Figure 1 for a 9-bit ADC at a cost of less than $ 3: if precision potentiometers were used as position sensors, the cost of this circuit would be slightly higher some.