Design of Digital Frequency Meter Based on FPGA
Abstract: This paper introduces a digital frequency meter based on the FPGA chip with VHDL language programming. The digital frequency meter adopts the method of equal precision measuring frequency, which has the constant precision, and does not change with the changed signal being measured. The range of frequency measurement is from 0 to 100 MHZ, and the error domain is less than one percent the auxiliaries of the design are setting the range, super range alarming, etc. This design works in integrated development environment of QuartusⅡ to compile, simulate the program, and download it to the FPGA chip. Through rigorous testing also can accurately measure all kinds of commonly used signal frequency like square wave, sine wave, triangle wave, sawtooth wave, etc.
Key Words: FPGA; VHDL; QuartusⅡ; Digital Frequency Meter
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