关键词: AT89S52, 脉冲宽度, 峰值

Abstract:

A pulse parameters test instrument is designed to measure and display the pulse width,period,frequency,duty ratio and peak value of pulse with easy reading.The input signal is shaped by LM393 to realize the measurement of pulse width,period and frequency using AT89S52 with software realization.The peak hold is achieved using LM398,and the peak value is converted into the corresponding frequency by LF331 for the AT89S52 to complete the final measurement and display.The instrument has good performance,simple circuit,and accurate test results.

Key words: AT89S52;pulse width;peak value of pulse