The implementation of improved phase projection method in FPGA

By measuring the resonant frequency, the silicon micro-accelerometer resonant got Instantaneous acceleration. For the frequency measurement requirements, a projection method with improved phase frequency measurement was proposed and put FPGA as a carrier in this paper. The original phase projection method has been improved in order to facilitate programming. In accordance with the improved algorithm, theoretical derivation and simulink simulation was given. Simulation in the frequency range 120KHz to 140KHz, analysed of the accuracy of the parameters affecting the simulation, and accuracy to mHz. Major attempt was the realization of arctangent function, the streamlined Cordic algorithm used, and used verilog HDL language programming.