Title :
The design of CMOS gigahertz-band continuous-time active lowpass filters with Q-enhancement circuits
Author :
Chang, Yuyu ; Choma, John, Jr. ; Wills, Jack
Author_Institution :
Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
A tunable second-order lowpass filter architecture capable of operating in the gigahertz frequency range is proposed. Two and-enhancement techniques are utilized to extend the Q tuning range. Simulation results employing standard 0.5 μm CMOS technology have successfully verified that the center frequency tuning and the hybrid Q-tuning approach operate between 1.26 GHz and 2.3 GHz center frequencies with Q larger than 1000. A tunable lowpass filter with a center frequency at 2.07 GHz with a Q equal to 31 is designed to have 44 dB input dynamic range and 27.8 mW power dissipation
Keywords :
CMOS analogue integrated circuits; Q-factor; UHF filters; UHF integrated circuits; circuit tuning; continuous time filters; integrated circuit noise; low-pass filters; 0.5 micron; 1.26 to 2.3 GHz; 27.8 mW; CMOS active low-pass filters; GHz frequency range; Q tuning range; Q-enhancement circuits; UHF; active lowpass filters; center frequency tuning; continuous-time lowpass filters; gigahertz-band filters; hybrid Q-tuning; tunable second-order filter architecture; Active filters; CMOS process; CMOS technology; Circuit topology; Frequency; Impedance; Q factor; Transfer functions; Tunable circuits and devices; Tuning;
Conference_Titel :
VLSI, 1999. Proceedings. Ninth Great Lakes Symposium on
Conference_Location :
Ypsilanti, MI
Print_ISBN :
0-7695-0104-4
DOI :
10.1109/GLSV.1999.757456
