The Small Signal and Amplitude of Alternating Current Measuring System

Abstract

This thesis is based on the examination item of 2016 Beijing College-student Electronic Design Contest, thus designing the small signal and amplitude of alternating current measuring system. MSP430G2553 microcontrollers are the main engine of this system. FPGA Cyclone 1C12 is slave engine, and external circuits OPA211 circuit board as an amplifier system. Main engine receive and calculate the frequency and voltage value of OPA211 direct or alternating current small signal. And the signal connects with the input of OPA211, as well as it magnifies the small signal received more than 20 times, and the output of OPA211 connects with the corresponding pins of microcontrollers. Slave engine receive signal sent by main engine and show the numerical value through digital transistor.