With the rapid economic development, the field of electronics industry has profoundly affected our production and life. In particular, the signal has been an important element of the field of electronics inside. Signal processing has been as important objects to study. In the process of production and life many times we need an accurate grasp of the law of the signal changes. How to unrecognized signal into a digital signal of the laws of research, is what we the technology needs of the electronics industry. The design is based on FPGA technology, design and produce a digital frequency meter. On the hardware side is through the external circuit shaping amplifier, input to the FPGA. The use of FPGA as the master for processing. The software part of the Verilog HDL hardware description language programming to the control of the FPGA.
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