Periodic signal waveform recognition and parameter measurement are widely used in the field of modern electronic technolo-gy.Through the research and analysis of periodic signal waveform,a periodic signal waveform identification and parameter measurement device is designed.Firstly,a program-controlled amplifier is used to accurately amplify the input signals of dif-ferent amplitudes.Then,the detector circuit is designed based on the LF398 chip.On this basis,the waveform signal is converted into TTL signal by a high-speed comparator.Finally,the Fourier algorithm is used to process the data collected by the ADC,so as to accurately determine the waveform type and display it on LCD.The test results show that the designed de-vice has high measurement accuracy and good real-time performance,which can provide a valuable reference for the design of periodic signal identification and detection device.
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