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A new electric conductance conversion method suitable for very low power applications
Affiliation:1. ESTG, Polytechnic Institute of Leiria, Portugal;2. CITAB/UTAD Centre for the Research and Technology of Agro-Environmental and Biological Sciences of UTAD, Portugal;3. INESC TEC (formerly INESC Porto) and University of Trás-os-Montes e Alto Douro, Portugal;1. HERD - Centre for Herd-oriented Education, Research and Development, Department of Large Animal Sciences, University of Copenhagen, Grønnegårdsvej 2, 1870 Frederiksberg C, Denmark;2. Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark;1. Ubiquitous MEMS and Micro Engineering Research Center, AIST, Tsukuba, Ibaraki, Japan;2. National Institute of Animal Health, NARO, Tsukuba, Ibaraki, Japan;3. Fujihira Industry Co. Ltd., Bunkyo, Tokyo, Japan;2. Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, PO Box 7023, SE-750 07 Uppsala, Sweden;3. Knowledge Center for Agriculture, DK-8200 Aarhus N, Skejby, Denmark;1. Department of Large Animal Clinical Sciences, University of Florida, Gainesville 32611;2. Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
Abstract:This article describes a new electrical conductance converter method suitable for low power applications and an implementation in standard CMOS technology. Despite being designed to meet specific measurements requirements, this converter is intended for applications where device power requirements are determinative such self powered sensors networks and implantable devices. The topology is described and an implementation is presented. Results show the possibility of being powered by a single 1.2 V accumulator cell with a consumption of 8 nJ per conversion.
Keywords:Conductance measurement  Low-power  CMOS  Lock-in amplifier  Chopper stabilization  Precision agriculture  Artificial insemination
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