DocumentCode
3011535
Title
Bidirectional current conveyer with chopper stabilization and dynamic element matching
Author
Jafari, Hamed Mazhab ; Genov, Roman
Author_Institution
Department of Electrical and Computer Engineering, University of Toronto, Canada
fYear
2012
fDate
20-23 May 2012
Firstpage
1079
Lastpage
1082
Abstract
A compact and accurate current conveyer for interfacing with a three-electrode electrochemical sensor is presented. It employs chopper stabilization to reduce transistor sizes for a given flicker noise. A current-copying circuit generates a mirror image of the sensor current for bidirectional conveying. It employs dynamic element matching to remove the mismatch in the current mirrors. The current conveyer prototyped in 0.13µm CMOS consumes 4µW from a 1.2V supply. It achieves an input-referred noise of 0.13pArms over a 1kHz bandwidth with a dynamic range of 8.6pA to 350nA. The prototype has been validated in DNA catalytic reporter detection.
Keywords
CMOS integrated circuits; Choppers (circuits); Electrodes; Mirrors; Noise; Sensors; Transistors;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location
Seoul, Korea (South)
ISSN
0271-4302
Print_ISBN
978-1-4673-0218-0
Type
conf
DOI
10.1109/ISCAS.2012.6271416
Filename
6271416
Link To Document