Frequency and Amplitude Measuring Instrument Based on STM32F107 and DE1SOC

In this paper, one frequency and amplitude measuring instrument is designed by the microcontroller STM32F107 and DE1-SOC. The amplitude of the input wave is measured by the ADC inside the STM32F107 and frequency of corresponding waves is obtained by and fpga in the DE1-SOC development kit and high-speed comparator TLV3501. The measuring range of frequency and amplitude is 0-50MHz and 50mV-2V respectively. The measurement results are very accurate and the error rate is only 0.8%.