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Vol. 82, Issue 8, August 2007, pp. 1381-1388




Sensor Signal Conditioning



Microbridge Technologies Inc.



Received: 29 June 2007   /Accepted: 20 August 2007   /Published: 27 August 2007


Abstract: The general problem of sensor signal conditioning is approached from the point of view of separating the intrinsic sensor properties from those associated with inserting the sensor into a conditioning circuit. This gives rise to a check list of attributes which would be useful to localize problems which may arise in using sensing devices.


A second part of the presentation provides a survey of traditional sensor conditioning techniques, going from simple analog op amp solutions to sophisticated digital technology using DSP and look up tables of correction coefficients.


A final section covers the use of a promising new passive analog technology to adjust resistance values using Rejustors. It is demonstrated that the Rejustor performance compares favorably to its digital counterpart, the digital potentiometer. It is concluded that the Rejustor could provide a simple and elegant solution to many sensor signal conditioning problems.


Keywords: Sensor signal conditioning, Rejustor, Analog sensor signal processor, DSP


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