Design And Reality Of Analog Front End Circuit In A Contactless Smart Card

Radio frequency identification (RFID) is an automatic identification technology developed from the eighty’s of last century. It uses the way of contactless radio frequency communication, data exchange, so as to achieve the purpose of identification. RFID operating frequency range according to a diverse range of applications,from low frequency to high frequency coverage of 125KHz 13.56MHz, and 900MHz UHF and microwave 2.4GHz, including almost all of the band.According to marketing investigation and research, RFID application is already mature in the domestic, and has been widely used in industrial automation, transportation, insurance, finance, communication etc.. This thesis mainly studies the whole architecture of a contactless smart card, and the focus to the analog front-end circuit, based on the ISO/14443, TypeA protocol,13.56MHz, eventually develop an analog front-end circuit IP block.This thesis introduces the design of analog front end circuit for a contactless smart card. After a deep study of smart card architecture system, radio frequency theory, electromagnetism, communication protocol. Then, introduces main module of AFE circuit, including power generation module, modulation module, demodulation module, clock generation module, reset module, and finally completed the design.The analog front-end circuit in this thesis is design based on EF130 process in HHGrace, and is verified after simulation and testing. After DIP28 package, the testchip of the circuit is testing in MP300 by Micropress company. Test results show that each part of the AFE circuit can work effectively. The AFE IP can bring to the market.