The Design of Wide Input Range and High-Precision Frequency Meter Based on FPGA

The traditional frequency measurement using discrete devices, accuracy is low,and the restrictions on the intensity of input signal leading to the versatility of frequency counter is limited. According to the principle of equal precision, use FPGA to design equal precision, while use of FPGA and programmablf amplifier to amplify the measured signal automatically to achieve a wide range of frequency meter input and high-precision measurements.