Design of Frequency and Phase Measurement System

Abstract

Frequency and phase are the most basic physical quantity for the instrumentation of electrical signal characteristics. This work proposes a frequency and phase measurement system by using Field-Programmable Gate Array (FPGA) and micro control unit (MCU). The proposed system consists of three modules: 1. Signal conditioning circuit module which is composed of a wide-band channel amplifier and a high-speed comparator; 2. Parameter measurement module; 3. Data display and control module. In addition, we implemented FPGA and MCU to realize duplex transmission of data through SPI communication interface. The system designed in this paper works well for a low to medium range speed frequency and phase measurement. simulation result shows a reasonable accuracy for the target quantities.