On the modelling of a CMOS magnetic sensor

Jack Lau, Ping K. Ko, Philip Ching Ho Chan

Research output: Journal article publicationConference articleAcademic researchpeer-review


Magnetic sensors are useful in applications such as magnetic read heads and non-contact current sensors. Ideally, a magnetic sensor should be easily integrated with its peripheral circuits. Experimental results indicate that it is possible to convert a conventional MOS transistor into a magnetic sensor by splitting the drain of the device into two. Such a device is attractive because the device is completely CMOS compatible. Integration of the sensor with electronic circuits can be easily achieved. However, to realize such an integration, simulation model compatible with circuit simulators is essential. No such model has been reported. In this paper, we describe the development of a model for this split-drain MOS magnetic sensor which can be easily incorporated into popular circuit simulators such as SPICE. In developing this model, numerical simulations using symbolic mathematical tools are used to gain a physical understanding. The model is applicable for device operating in the linear region, and it is verified against experimental results.
Original languageEnglish
Pages (from-to)323-326
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
Publication statusPublished - 1 Dec 1994
Externally publishedYes
EventProceedings of the 1994 IEEE International Symposium on Circuits and Systems. Part 3 (of 6) - London, United Kingdom
Duration: 30 May 19942 Jun 1994

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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