在低频应用中,很多单片采样/保持电路都有下降率的问题,它会造成不可接受的输出大误差。图1中的S/H电路采用两个背靠背连接的8位多功能转换器,消除了下降率误差。该电路需要一只5V电源,可接受0V~2.5V之间的模拟输入(不过可以对任何输入信号做调整和偏移,使之落入这个区间)。 In low frequency applications, many monolithic sample / hold circuits have a problem of the rate of descent, which can cause unacceptable output errors. The S / H circuit in Figure 1 uses two 8-bit multifunction converters connected back-to-back, eliminating the drop-rate error. The circuit requires a 5V supply that accepts analog inputs between 0V and 2.5V (although any input signal can be adjusted and offset to fall into this range).