在工业自动化过程中往往要将某些过程量如温度、压力等转换成相应电信号的最大值保留下来以供记录、分析。峰值检测技术就是一种能跟随输入信号变化并能将最大值记忆下来的电路。通过理论分析、Multisim仿真和实际电路制作逐步比较了各峰值采样保持电路的优缺点,并不断改进电路,克服了管压降、部分信号丢失、采样频率低等诸多弊端,最后设计的峰值检测电路能够满足一般电路对峰值检测技术的要求。 In the process of industrial automation, it is often necessary to convert some of the process variables such as temperature and pressure into the maximum corresponding electrical signals for recording and analysis. Peak detection technology is a circuit that follows the change of the input signal and memorizes the maximum value. Through theoretical analysis, Multisim simulation and actual circuit fabrication, the advantages and disadvantages of each peak sample-and-hold circuit are compared step by step, and the circuit is continuously improved to overcome the disadvantages of tube voltage drop, partial signal loss and low sampling frequency. Finally, the peak detection circuit To meet the general circuit of peak detection technology requirements.