125kHz RFID反馈系统稳定性的研究  

Research on Stability in 125kHz RFID Feedback System

作　　者：杨彪[1] 田曲平[2] 应建华[1] 

机构地区：[1]华中科技大学电子科学与技术系,武汉430074 [2]孝感学院外国语学院,湖北孝感432400

出　　处：《半导体技术》2008年第10期917-922,共6页Semiconductor Technology

基　　金：武汉市电子信息产业发展资金(2007008024)

摘　　要：设计了一种射频识别(RFID)收发器模拟前端芯片,可广泛应用于手持终端读卡器等读卡器电子设备。介绍了RFID收发器原理,并在滤波模块设计方面从系统传递函数入手,提出了分析有限增益运放传递函数的4种方法,进而重点分析了考虑寄生参数的实际运放电路两级运放补偿和零点消除技术,并给出滤波电路和采样电路的仿真结果。本芯片采用德国XFAB高压CMOS 0.6μm的工艺流片成功,仿真测试结果满足设计要求,系统在各种应用条件和环境下均能正常工作,达到设计要求。A kind of RF identification （RFID） transceiver analog front-end chip used extensively in handheld terminal card reader was designed using 0.6 um CMOS process. The principle of RFID transceiver was introduced, and in the filter module design the four kinds of methods were presented for analyzing system transfer functions of finite gain operational amplifiers. And the compensation and zero elimination technology of two-stage operational amplifiers with capacitor parasitics were studied. The simulation results of sample and filter modules were given. The chip was taped out successfully by XC06 process of XFAB Company. Simulation and testing results satisfy the design requirements. And at different kinds of application conditions the chip works normally, reaches design and application requirements.

关 键 词：射频识别 收发器 密勒补偿 零点消除 

分 类 号：TN402[电子电信—微电子学与固体电子学]