凡涉及到模拟量转换成数字量的过程都需要模/数(A/D)转换器。例如,对温度、压力、流量、重量、速度和位移等参数的检测或控制,通过传感器分别将被控制参数变成电量,经过放大后的模拟量须经过A/D转换,转换成相应的数字量,才能由计算机进行处理。相对于数字电路来说,A/D转换器芯片的价格比较昂贵,在精度要求高(因而位数相应增多)的场合,价格将成倍增加。为降低产品成本,设计中应该在价格较低的A/D转换器芯片上挖掘潜力,改进和提高A/D的 Any process involving the conversion of analog to digital requires an A / D converter. For example, the temperature, pressure, flow, weight, speed and displacement of the detection or control parameters, respectively, by the sensor will be controlled parameters into electricity, the amplified analog to be A / D conversion, converted to the corresponding figures The amount can be processed by the computer. Compared with digital circuits, A / D converter chips are more expensive, and the price will increase exponentially when precision is high (and thus the number of bits is increased). In order to reduce the product cost, the design should tap potential in the lower price A / D converter chip, improve and improve A / D