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Digitally Programmable Analogue Circuits for Sensor Conditioning Systems
Teltronic S.A.U., R&D Department, Polígono Malpica, calle F-Oeste, 50057 Zaragoza, Spain
Group of Electronic Design, Aragon Institute for Engineering Research, I3A, Facultad de Ciencias, Pedro Cerbuna 12, 50009 Zaragoza, Spain
Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro # 1, Tonantzintla, Puebla, Mexico
* Author to whom correspondence should be addressed.
Received: 16 April 2009; in revised form: 12 May 2009 / Accepted: 13 May 2009 / Published: 14 May 2009
Abstract: This work presents two current-mode integrated circuits designed for sensor signal preprocessing in embedded systems. The proposed circuits have been designed to provide good signal transfer and fulfill their function, while minimizing the load effects due to building complex conditioning architectures. The processing architecture based on the proposed building blocks can be reconfigured through digital programmability. Thus, sensor useful range can be expanded, changes in the sensor operation can be compensated for and furthermore, undesirable effects such as device mismatching and undesired physical magnitudes sensor sensibilities are reduced. The circuits were integrated using a 0.35 mm standard CMOS process. Experimental measurements, load effects and a study of two different tuning strategies are presented. From these results, system performance is tested in an application which entails extending the linear range of a magneto-resistive sensor. Circuit area, average power consumption and programmability features allow these circuits to be included in embedded sensing systems as a part of the analogue conditioning components.
Keywords: sensor readout circuits; electronics for sensor conditioning; neural networks circuits
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MDPI and ACS Style
Zatorre, G.; Medrano, N.; Sanz, M.T.; Aldea, C.; Calvo, B.; Celma, S. Digitally Programmable Analogue Circuits for Sensor Conditioning Systems. Sensors 2009, 9, 3652-3665.
Zatorre G, Medrano N, Sanz MT, Aldea C, Calvo B, Celma S. Digitally Programmable Analogue Circuits for Sensor Conditioning Systems. Sensors. 2009; 9(5):3652-3665.
Zatorre, Guillermo; Medrano, Nicolás; Sanz, María Teresa; Aldea, Concepción; Calvo, Belén; Celma, Santiago. 2009. "Digitally Programmable Analogue Circuits for Sensor Conditioning Systems." Sensors 9, no. 5: 3652-3665.