在实际工作中,经常会遇到幅值大于零的信号和幅值小于零的信号。在用计算机对其峰值进行数据采集时,必须有相应的峰值保持电路。本人根据实验的需要,自己设计了这种电路,并且方便地实现了同8098单片机的接口。经过半年多时间的使用,证明它工作可靠,完全可以满足实验的要求。图1(a)是正峰值保持电路。图中运放A_1以倒相方 In practice, we often encounter signals with amplitude greater than zero and signals with amplitude less than zero. In the computer with its peak data acquisition, there must be a corresponding peak hold circuit. I based on the needs of the experiment, designed their own circuit, and easily achieved with the 8098 microcontroller interface. After more than six months of use, to prove that it is reliable, fully meet the requirements of the experiment. Figure 1 (a) is a positive peak hold circuit. In the figure, op amp A_1 is inverted