NDLI: New Low-Voltage Electrically Tunable Triode-MOSFET Transconductor and its Application to Low-Frequency Gm-C Filtering

Content Provider	IEEE Xplore Digital Library
Author	Dualibe, C. Petrashin, P. Toledo, L. Lancioni, W.
Copyright Year	2005
Description	Author affiliation: Laboratorio de Microelectron., Univ. Catolica de Cordoba (Dualibe, C.; Petrashin, P.; Toledo, L.; Lancioni, W.)
Abstract	A new low-voltage electrically tunable transconductor is presented. Its transconductance can be settled by means of a ratio between a reference current and a reference voltage rendering the circuit independent of technological parameters, to a first order approach. This property allows, to some extent, reusing the transconductor in several CMOS processes. A kind of linear current division strategy turns also the transconductance inversely proportional to a product of two ratios between transistors' sizes that can be chosen so as to meet the desired Gm order of magnitude. This feature, together with a low-current biasing policy, is exploited in order to get a transconductance in the range of lnS, as needed for very low-frequency filters. For a 2 V supply and a 20pF load capacitor, an integrator characterization in a 1.6mum CMOS technology revealed a unity-gain frequency $f_{T}$ of 10Hz, a current consumption of 220nA and an input-referred noise of $2.2muV_{rms}.$ Using this transconductor, a 10Hz third-order low-pass transconductance-capacitor (Gm-C) Butterworth filter was designed. It is intended for smoothing the output of a chopper amplifier. The filter shows acceptable performance in terms of die area $(1.9mm^{2})$ and power consumption (1muAV), as desired for low-voltage low-power (LVLP) applications
Starting Page	207
Ending Page	212
File Size	2373457
Page Count	6
File Format	PDF
ISBN	1595931740
DOI	10.1109/SBCCI.2005.4286858
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-04
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Association for Computing Machinery, Inc. (ACM)
Subject Keyword	Transconductors Transconductance CMOS technology Filters Tunable circuits and devices Filtering Voltage CMOS process Capacitors Frequency Gm-C filter Measurement Design Analog CMOS low-voltage low-power instrumentation amplifier low-frequency transconductor
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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