Title :
Low-Power and Widely Tunable Linearized Biquadratic Low-Pass Transconductor-C Filter
Author :
Tajalli, Armin ; Leblebici, Yusuf
Author_Institution :
Microelectron. Syst. Lab. (LSM), Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland
fDate :
3/1/2011 12:00:00 AM
Abstract :
A sixth-order low-pass transconductor-C filter with a very wide tuning range (fc = 100 Hz to 10 MHz) is presented. The wide tuning range has been achieved without using switchable components or programmable building blocks. A single-stage folded cascode transconductor is employed to implement the proposed filter. A modified biquadratic topology is introduced to improve linearity performance of the filter over its tuning range. Power consumption of the filter scales linearly with cutoff frequency (60 pW/Hz/pole). Implemented in 0.18-μm complementary metal-oxide-semiconductor technology, the filter exhibits relatively constant noise and linearity performance over its entire tuning range and occupies a silicon area of 0.16 mm2 (0.027 mm2/pole).
Keywords :
CMOS analogue integrated circuits; biquadratic filters; circuit tuning; elemental semiconductors; low-pass filters; low-power electronics; silicon; CMOS technology; complementary metal-oxide-semiconductor technology; frequency 100 Hz to 10 MHz; linearity performance; linearized biquadratic low-pass transconductor-C filter; low-power filter; modified biquadratic topology; silicon area; single-stage folded cascode transconductor; sixth-order filter; size 0.18 mum; tuning range; widely-tunable filter; CMOS integrated circuits; Cutoff frequency; Linearity; Noise; Solid state circuits; Topology; Tuning; $g_{m}$-C filter; Biquadratic filter; complementary metal–oxide–semiconductor (CMOS) integrated circuits; continuous-time filters; subthreshold; transconductor-C; weak inversion; widely tunable;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2011.2111530
