UHF RFID阅读器中可编程全差分低通滤波器的设计  

A Programmable Fully Differential Low-Pass Filter for Single-chip UHF RFID Reader

作　　者：刘琳[1] 李萌[1] 陈磊[1] 陈子晏[1] 张润曦[1] 赖宗声[1,2] 

机构地区：[1]华东师范大学微电子电路与系统研究所,上海200062 [2]华东师范大学纳光电集成与先进装备教育部工程研究中心,上海200062

出　　处：《微电子学》2008年第6期886-890,共5页Microelectronics

基　　金：上海市国际合作基金项目(07SA04);上海市科委项目(06SA14);上海重点学科建设资助项目(B411)

摘　　要：基于TSMC 0.25μm RF CMOS工艺,提出了一种应用于860～960 MHz UHF波段单片射频识别(RFID)阅读器的可编程全差分低通滤波器电路。该滤波器为6阶切比雪夫有源RC滤波器,其中的运放采用带共模反馈的全平衡差动放大器结构(FBDDA)实现了全差分的缓冲器。仿真结果表明:该电路可以通过3位信号控制位产生截止频率为400 kHz、600 kHz、800 kHz、1 MHz以及1.3 MHz的全差分低通滤波器,1 MHz处的点噪声为20 nV/(Hz)^(1/2),1 dB输入压缩点为15 dBm,3.3 V电源电压下电路消耗总电流为4.86 mA。A 6th-order programmable fully differential Chebyshev low-pass filter for 860-960 MHz UHF RFID reader was implemented based on TSMC＇s 0. 25μm RF CMOS process. A fully balanced differential difference amplifier using common-mode feedback （CMFB） strategy was employed in this circuit. Circuit simulation showed that the cut-off frequency of the filter could be controlled to 400 kHz,600 kHz,800 kHz,1000 kHz and 1.3 MHz by a 3- bit controller, and a spot noise of 20 nV//Hz at 1 MHz and 1 dB input compression point of 15 dBm were achieved for the circuit, which dissipates 4. 86 mA of current from a single 3.3 V power supply.

关 键 词：超高频 射频识别 全平衡差动放大 可编程低通滤波器 

分 类 号：TN431.1[电子电信—微电子学与固体电子学]