NDLI: A transimpedance-amplifier-based subtraction principle for optimum signal resolution in mixed-signal current sensor systems

Content Provider	IEEE Xplore Digital Library
Author	Mailand, M. Getzlaff, S.
Copyright Year	2011
Description	Author affiliation: ZMDI, Zentrum Mikroelektronik Dresden AG, Business Line Medical & SSC, Grenzstrasse 28,01109 Dresden, Germany (Mailand, M.; Getzlaff, S.)
Abstract	Generally, there are two strategies to obtain a signal difference of two current sources: analog or digital subtraction. Digital subtraction limits the final resolution of the difference. Analog subtraction yields limitations in gain, range and sensitivity, respectively and may suffer from imperfections of the analog subtraction circuitry (e.g. matching, non-linearity, etc.). In this article, an approach is explained and demonstrated to maximize signal range, sensitivity and final resolution for the difference of two or more (sensor) input signals by utilizing integrating amplifiers with differential outputs. The correlated double-sampling concept is extended therefore. Signal properties and system constraints are explained. The applicability is demonstrated by a 0.6μm-CMOS implementation example for the subtraction of two photo-current input signals within a single transimpedance amplification stage.
Starting Page	462
Ending Page	465
File Size	340169
Page Count	4
File Format	PDF
ISBN	9781612841359
e-ISBN	9781612841373
DOI	10.1109/NEWCAS.2011.5981270
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-26
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Signal resolution Dynamic range Switches Sensor systems Mirrors Sensitivity
Content Type	Text
Resource Type	Article

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