Title :
A wide-input linear range sub-threshold transconductor for sub-Hz filtering
Author :
Sawigun, Chutham ; Pal, Dipankar ; Demosthenous, Andreas
Author_Institution :
Dept. of Electron. Eng., Mahanakorn Univ. of Technol., Bangkok, Thailand
fDate :
May 30 2010-June 2 2010
Abstract :
A weakly inverted MOS transconductor with wide input linear range and very low transconductance is proposed. The transconductor is achieved by efficient input voltage attenuation formed by connecting identical simple source coupled pairs in a scheme that provides very high extensibility of voltage scaling. Post-layout simulated results in a 0.35-μm standard CMOS process show that Gm in the range of 0.05-1.3 nA/V is achievable along with 380 mVp-p linear range, at 1% Gm variation under 1.5-V supply. Application in first-order low-pass sub-hertz filtering (with tunable cut-off frequency from 0.3-3 Hz) is demonstrated.
Keywords :
CMOS integrated circuits; MOSFET; low-pass filters; MOS transistors; first-order low-pass subhertz filtering; post-layout simulation; size 0.35 mum; standard CMOS process; voltage 1.5 V; voltage 380 mV; voltage attenuation; voltage scaling; weakly inverted MOS transconductor; wide-input linear range subthreshold transconductor; Attenuation; CMOS process; Cutoff frequency; Filtering; Joining processes; Low pass filters; Nonlinear filters; Transconductance; Transconductors; Voltage;
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.2010.5537415
