NDLI: An active charge cancellation system for switched-capacitor sensor interface circuits

Content Provider	IEEE Xplore Digital Library
Author	Schiffer, B.R. Burstein, A. Kaiser, W.J.
Copyright Year	1966
Abstract	Interface circuits determine the performance of microsensors in diverse automotive, medical, and process-control applications. Microsensor systems for acceleration, rotation, pressure, and other signals most typically rely on capacitive displacement measurement in microstructures. Displacement sensitivity requirements are typically 0.1 pm with sensor capacitor values of 100 fF or less. Conventional architectures for capacitive displacement measurement have required bias control with either large value off-chip or large-area integrated resistive circuit components. Switched-capacitor measurement methods may provide a fully integrated solution with compact geometry but have been limited by severe charge injection error signals. The active charge cancellation system (ACCS), reported here, provides the first direct compensation of switched-capacitor charge-injection error at the measurement system input. The ACCS, implemented in a 0.8-/spl mu/m digital CMOS technology, uses a novel feedback network to directly cancel charge injection and reduce error by over two orders of magnitude without need for component matching.
Sponsorship	IEEE Solid-State Circuits Society IEEE Electron Devices Society IEEE Circuits and Systems Society Japan Society of Applied Physics (JSAP) IEEE Microwave Theory and Techniques Society IEEE San Francisco Section Bay Area Council Univ. PA IEEE
Starting Page	2134
Ending Page	2138
Page Count	5
File Size	196718
File Format	PDF
ISSN	00189200
Volume Number	33
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor systems Microsensors Displacement measurement Current measurement Charge measurement Integrated circuit measurements CMOS technology Automotive engineering Accelerometers Acceleration
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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