Title :
Design of current-mode gm-C MLF elliptic filters for wireless receivers
Author :
Zhu, Xi ; Sun, Yichuang ; Moritz, James
Author_Institution :
Sch. of EC&EE, Univ. of Hertfordshire, Hatfield
fDate :
Aug. 31 2008-Sept. 3 2008
Abstract :
Two CMOS fifth-order gm-C elliptic lowpass filters based on the current-mode multiple loop feedback (MLF) leap-frog (LF) and follow-the-leader-feedback (FLF) configurations are designed. The filters are implemented using a fully-differential linear operational transconductance amplifier (OTA). PSpice simulations using a standard TSMC 0.18mum CMOS process with 1.8V power supply have shown that the cut-off frequency of both filters can be tuned from 28MHz to 44MHz, dynamic range is about 67dB and 62dB for the LF and FLF filters respectively, and power consumption is about 67mW at 30MHz for both filters. Less than 0.5dB passband ripple is achieved for both filters; 65dB and 50dB stopband attenuations are obtained for MLF LF and FLF configurations, respectively.
Keywords :
continuous time filters; elliptic filters; receivers; PSpice simulation; current-mode multiple loop feedback leap-frog; elliptic filters; elliptic lowpass filters; follow-the-leader-feedback configurations; frequency 28 MHz to 44 MHz; frequency 30 MHz; fully-differential linear operational transconductance amplifier; passband ripple; size 0.18 mum; stopband attenuations; voltage 1.8 V; wireless receivers; CMOS process; Cutoff frequency; Dynamic range; Energy consumption; Feedback loop; Nonlinear filters; Operational amplifiers; Power filters; Power supplies; Transconductance;
Conference_Titel :
Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on
Conference_Location :
St. Julien´s
Print_ISBN :
978-1-4244-2181-7
Electronic_ISBN :
978-1-4244-2182-4
DOI :
10.1109/ICECS.2008.4674849
