Paper Info
Title
Design of low-Gm transconductors using varactor-based degeneration and linearization technique
Abstract
Low-G <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> transconductors are useful for designing low-frequency-cutoff filters and amplifiers used in processing of biomedical signals. However, designing fully integrated low-G <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> transconductors presents a challenge due to limitations on the size of on-chip capacitors and resistors and due to requirements on the signal dynamic range and the linearity of the transconductor. In this paper we propose a novel method for designing low-G <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> transconductors using a varactor-based degeneration and linearization technique. The technique uses negative feedback where a varactor changes the capacitance of a floating-gate to compensate for the change in the input voltage. This results in the degeneration of the transconductance and a differential configuration of the input stage linearizes and enhances the dynamic range of the transconductor. We verify and characterize the proposed approach using measurement results obtained from prototypes fabricated in a 0.5-μm CMOS process.
Year
DOI
Venue
2015
10.1109/BioCAS.2015.7348305
2015 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Keywords
Field
DocType
low-Gm transconductor design,varactor-based degeneration,linearization technique,low-frequency-cutoff filters,amplifiers,biomedical signal processing,on-chip capacitors,resistors,floating-gate,CMOS
Dynamic range,Capacitor,Computer science,Linearity,Electronic engineering,Resistor,Transconductance,Linearization,Varicap,Amplifier
Conference
ISSN
Citations 
PageRank 
2163-4025
1
0.40
References 
Authors
4
2
Name
Order
Citations
PageRank
Liang Zhou154.59
Shantanu Chakrabartty233564.30