Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/87395
Type: Artigo de evento
Title: Offset Reduction In A Multiple-terminal Hall Plate Using Current Spinning
Author: Ramirez J.
Fruett F.
Abstract: The present work analyzes a four-terminal Hall-plate device to determine the main sources of error and explain how current-spinning technique can be used to effectively reduce offset and noise. Based on this analysis, an improved magnetic sensor is designed using an eight terminal octagonal Hall plate and a chopped-based control circuit to implement the current-spinning technique. Since Hall plates are complete compatible with the CMOS manufacturing process, a monolithic chip which contains the sensor, switches, digital control and bias circuit were fabricated using a 0.6 μm commercial CMOS process. These devices are used to test the offset cancellation methodology and compare if there are advantages related to the device orientation or switching sequence. Experimental results show a residual offset of 0.25 mT, a 99% reduction compared with the original offset level measured at Hall plate.
Editor: Institute of Electrical and Electronics Engineers Inc.
Rights: fechado
Identifier DOI: 10.1109/IBERSENSOR.2014.6995556
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84921683998&partnerID=40&md5=8af7d3214b49128b8220f2d216a5fb6c
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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