Title :
Source-follower-based bi-quad cell for continuous-time zero-pole type filters
Author :
Chen, Yong ; Mak, Pui-In ; Zhou, Yumei
Author_Institution :
Inst. of Microelectron., Chinese Acad. of Sci., Beijing, China
fDate :
May 30 2010-June 2 2010
Abstract :
Presented is a novel source-follower-based (SFB) bi-quad cell suitable for realizing continuous-time zero-pole type filters. Unlike the conventional SFB bi-quad cells that can only realize complex poles, additional complex zeros can be synthesized in the proposed one, by adding two feedforward capacitors. A 4th-order Chebyshev II fully differential low-pass filter prototype was fabricated in a 0.18-μm CMOS process. The achieved bandwidth is 2.75 MHz with +5 dBm in-band IIP3 and -1 dB gain. The power consumption is 3 mV at a 2-V supply.
Keywords :
CMOS integrated circuits; Chebyshev filters; biquadratic filters; capacitors; continuous time filters; feedforward; low-pass filters; poles and zeros; CMOS process; Chebyshev II fully differential low-pass filter prototype; SFB bi-quad cell; bandwidth 2.75 MHz; complex zeros; continuous-time zero-pole type filters; feedforward capacitors; in-band IIP3; power consumption; size 0.18 mum; source-follower-based bi-quad cell; voltage 2 V; Active filters; Capacitance; Capacitors; Chebyshev approximation; Low pass filters; Microelectronics; Poles and zeros; Transconductance; Transfer functions; Very large scale integration;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537781
