Floating-gate-based tunable CMOS low-voltage linear transconductor and its application to HF gm-C filter design

This paper presents a new CMOS low-voltage linear transconductor for very high frequency. It uses multiple-input floating-gate transistors in each inverter of the differential structure transconductor presented by Nauta in [1]. The proposed transconductor operates under a constant low-voltage supply...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 2001-01, Vol.48 (1), p.106-110
Main Authors: Munoz, F, Torralba, A, Carvajal, R.G, Tombs, J, Ramirez-Angulo, J
Format: Article
Language:English
Online Access:Get full text
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Summary:This paper presents a new CMOS low-voltage linear transconductor for very high frequency. It uses multiple-input floating-gate transistors in each inverter of the differential structure transconductor presented by Nauta in [1]. The proposed transconductor operates under a constant low-voltage supply as low as 1.2 V, and its transconductance and output resistance are independently tunable, as shown by experimental measurements. This architecture is suitable for use in high-frequency continuous-time filters with programmable center frequency and quality factor. Simulation results of a 10.7-MHz and Q = 40 g sub(m) - C filter operating with a voltage supply of 1.4 V and with rail-to-rail input swing are presented.
ISSN:1057-7130
1558-125X
DOI:10.1109/82.913194