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Low power impedance measurement integrated circuit for sensor applications
- Source :
- Microelectronics Journal. 40:177-184
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- In this paper an integrated circuit for the measurement of the real and imaginary part of an impedance is presented. The circuit is intended for its use in a wireless integrated system. A mixed analog/digital approach has been adopted in order to minimize power and area requirements, as requested by the application. The four electrode configuration is used for impedance measurement using two excitation current sources and a buffer instead of an instrumentation amplifier, therefore reducing the circuit complexity. The digital block controls the working frequency and can compensate the phase error introduced by the analog filters, thereby reducing the total error in the measurement. The integrated circuit has been designed in a CMOS process and it works with 3.3 V with a power consumption of . Experimental results to verify its functionality are presented.
- Subjects :
- Engineering
Electronic instrumentation
business.industry
Circuit design
Impedance measurement
General Engineering
Electrical engineering
Multifrequency measurement
Mixed-signal integrated circuit
Discrete circuit
Circuit extraction
Chemical transducers
Electronic engineering
Equivalent circuit
Instrumentation amplifier
Physical design
business
Electrical bio-impedance
Linear circuit
Subjects
Details
- ISSN :
- 00262692
- Volume :
- 40
- Database :
- OpenAIRE
- Journal :
- Microelectronics Journal
- Accession number :
- edsair.doi.dedup.....3a73656ca6d2821a3d06fb6e956f03c5