A reconfigurable complex band-pass filter with improved passive compensation  

作　　者：范超杰 莫亭亭 陈东坡 周健军 

机构地区：[1]Centre of Analog and Radio Frequency Integrated Circuits(CARFIC),Shanghai Jiao Tong University

出　　处：《Journal of Semiconductors》2012年第12期66-72,共7页半导体学报（英文版）

基　　金：Project supported by the Chinese National Major Science and Technology Projects(No.2009ZX01031-002-005)

摘　　要：This paper presents a 5th-order Chebyshev-I active RC complex filter for multi-mode multi-band global navigation satellite systems （GNSS） RF receivers. An improved passive compensation technique is used to cancel the excess phase lag of the integrators, thus ensuring the in-band flatness of the frequency response over various ambient conditions. The filter has a programmable gain from 0 to 42 dB with a 6 dB step, a tunable center fre- quency at either 6.4 MHz or 16 MHz, and a bandwidth from 2 to 20 MHz with less than 3% frequency uncertainty. Implemented in a 0.18μm CMOS process, the whole filter consumes 7.8 mA from a 1.8 V supply voltage and occupies a die area of 0.4 mm2.This paper presents a 5th-order Chebyshev-I active RC complex filter for multi-mode multi-band global navigation satellite systems （GNSS） RF receivers. An improved passive compensation technique is used to cancel the excess phase lag of the integrators, thus ensuring the in-band flatness of the frequency response over various ambient conditions. The filter has a programmable gain from 0 to 42 dB with a 6 dB step, a tunable center fre- quency at either 6.4 MHz or 16 MHz, and a bandwidth from 2 to 20 MHz with less than 3% frequency uncertainty. Implemented in a 0.18μm CMOS process, the whole filter consumes 7.8 mA from a 1.8 V supply voltage and occupies a die area of 0.4 mm2.

关 键 词：complex filter LOW-IF multi-band GNSS quality factor passive Q compensation frequency cali-bration 

分 类 号：TN713.5[电子电信—电路与系统]