低功耗高线性多频带Gm-C低通滤波器.pdf

Computer Engineering and Applications Gm-C 1 1 2 2 2 ZHANG Mingmin , ZENG Yun , WEI Baoyue , FAN Xiaohua , ZHANG Haiying 1. 410082 2. 100029 1. School of Physics and Microelectronics Science, Hunan University, Changsha, Hunan 410082, China 2. Institute of Microelectronics, The Chinese Academy of Sciences, Beijing 100029, China ZHANG Mingmin, ZENG Yun, WEI Baoyue, FAN Xiaohua, ZHANG Haiying. Low power and highly li- nearity multiband Gm-C low-pass filter. Computer Engineering and Applications. Abstract: A low power and high linearity transconductor was presented. It was based on the topology of flipped voltage follower (FVF), and the transconductor value can be precisely set by the control voltage. A multiband Gm-C low-pass filter (LPF) for wireless transceiver system based on the proposed transconductor was designed. LPF is a th 6 -order Butterworth filter formed by 3 Biquads. The filter cut-off frequency can be varied from 70k, 140k to 210k. It was designed with SMIC 0.18µm CMOS process. The simulation results show that the IIP3 of filter is 22.6dBm and it consumes 1.37 mW under a 1.8V power supply. Key words: low-pass filter; transconductor; low power; highly linearity; multiband : (flipped voltage follower, FVF) Gm-C 70k140k 210k SMIC 0.18µm CMOS IIP3 22.6dBm1.8V 1.37mW :;;;; doi:10.3778/j.issn.1002-8331.1307-0031 : A :TN911.71 CMOS [1] Active-RCMOSFET-C Gm-C [2] Active-RC :2012 :TD-SCDMA/TD-LTE (No.BZ0155) (1988 ),,,