高精度小信号峰值检测电路的设计  

Design of Small Signal Peak Detection Circuit with High Precision

作　　者：全丽希 李跃忠[1] 熊永康[1] 

机构地区：[1]东华理工大学机械与电子工程学院,江西南昌330013

出　　处：《仪表技术》2014年第7期49-51,共3页Instrumentation Technology

基　　金：国家自然科学基金项目(61064013);江西省科技厅科技支撑计划项目(2010BGB01600)

摘　　要：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。During the process of industrial automation, some maximum process parameters such as temperature and pressure are converted into corresponding electrical signals for record and analysis. Peak detection technology is a kind of memory circuit which can follow the input signal change and can storage the peak. In this paper, it gradually compares the advantages and disadvantages of each peak＇s sample-and-hold circuit through theoretical analysis, Muhisim simulation and actual circuit production, improves circuit constantly, and overcame many disadvantages such as the pipe pressure drop, part of the signal loss and low sampling frequency. The final peak detection circuit can meet the requirements of general circuit for peak detection technology.

关 键 词：高精度 小信号 峰值检测技术 仿真调试 

分 类 号：TN710[电子电信—电路与系统]