Paper Info
Title
Gm-C biquad filter for low signal sensor applications
Abstract
This paper presents a circuit topology for a G <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> -C biquad filter, suitable for low frequency signals with low amplitude. The low cutoff frequencies are obtained reducing the transconductance G <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> through a current division technique. Moreover, all the active devices are operating in weak inversion mode lowering the requirements for the level of the voltage power supply. A second and fourth order filter configuration, based on a Tow-Thomas biquad, is designed and simulated. The filter operates in weak inversion with a supply of 0.9V, achieves a cutoff frequency of 52Hz, and power consumption around 2.8μW. The integrated noise is 24.4μV <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rms</sub> , the dynamic range is 43dB, and the filter shows -40dB THD for 5mV input peak amplitude.
Year
DOI
Venue
2016
10.1109/MIXDES.2016.7529733
2016 MIXDES - 23rd International Conference Mixed Design of Integrated Circuits and Systems
Keywords
Field
DocType
gm-C filter,biquad,weak inversion,low cutoff frequency
Band-stop filter,Digital biquad filter,Electronic engineering,High-pass filter,Low-pass filter,Cutoff frequency,Electrical engineering,Voltage-controlled filter,Mathematics,Filter design,Butterworth filter
Conference
ISBN
Citations 
PageRank 
978-1-5090-3099-6
0
0.34
References 
Authors
7
2
Name
Order
Citations
PageRank
Richa Arya100.34
João P. Oliveira221021.08