近年来,数字信号处理技术日见走俏。然而,真实世界的信号如声音、图像、温度、压力、湿度、物体的位置和速度都是连续时间模拟信号,在进入数字信号处理器(DSP)和其它数字处理部件之前,需要传感器把它们转换成电信号,经过放大、滤波、采样保持和模拟数字转换成为数字量,经过数字处理后的数字信号需要转换成为连续时间模拟信号,经过功率放大后用于推动伺服电机,扬声器或者显示器。Burr- In recent years, digital signal processing technology has become increasingly popular. However, real-world signals such as sound, image, temperature, pressure, humidity, position and velocity of objects are continuous-time analog signals that require sensors to convert them before entering digital signal processors (DSPs) and other digital processing components. The electrical signals are amplified, filtered, sampled and held, and converted into digital quantities by analog and digital conversion. Digitally processed digital signals need to be converted into continuous-time analog signals that are used to drive servo motors, speakers, or displays after power amplification. Burr-