一种多频多模接收机低功耗信道选择滤波器  

A Lower Power Channel Selective Filter for Multi-Frequency Multi-Mode Receiver

作　　者：谢淼[1] 任旭[1] 马聪[1] 张润曦[1] 赖宗声[1] 

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

出　　处：《微电子学》2012年第4期534-538,555,共6页Microelectronics

基　　金：国家科技重大专项(2009ZX01034-002-002-001-02)

摘　　要：基于GSMC 0.18μm RF CMOS工艺,实现了一种8阶有源RC信道选择滤波器,其截止频率在200kHz～10MHz范围内可调,能覆盖GSM,UHF RFID,TD-SCDMA,IEEE 802.11a/b/g等不同频段。提出一种增益带宽积可变的运算放大器,以优化不同模式下的功耗。正交两路信道选择滤波器的芯片尺寸为1.5mm×0.36mm。测试结果表明,在1.8V电源下,滤波器消耗8.6mA,4mA和2.6mA电流,等效输入噪声为20nV/Hz～(1/2),输入3阶交调为15dBm。Based on GSMC 0.18 μm RF CMOS process, a low-power 8＇h-order active RC channel selective filter was designed for multi-frequency/multi-mode receiver. The filter achieved a tunable cut-off frequency ranging from 200 kHz to 10 MHz, which covers all frequency bands from GSM, UHF RFID, TD-SCDMA to IEEE 802. 11a/b/ g. An operational amplifier with variable GBW was proposed tO optimize power consumption in different modes. The channel selective filter for both I ＆ Q channels occupied a chip area of 1.5 mm × 0.36 mm. The circuit had an input reference noise of 20 nV/√Hz and an IIP3 of 15 dBm, while consuming a current of 8.6/4/2.6 mA from a 1. 8 V supply.

关 键 词：信道选择滤波器 有源RC滤波器 多模多频接收机 

分 类 号：TN432[电子电信—微电子学与固体电子学] TN713.4