Abstract
Electronic sensor interfaces, developed in VM approach, generally use a conversion towards an output DC voltage signal, especially where the variations of the sensing element (resistance or capacitance) are relatively small (one to two decades). On the contrary, if the sensor variations are larger, i.e., three decades or more, a conversion towards an output periodic AC voltage signal is mandatory. In fact, in the latter case, the conversion to an output voltage is not advisable owing to the limitations given by the noise (for low output voltage levels) and by the supply voltage (for high output voltage levels). In this Chapter, different VM readout circuit solutions for resistive, capacitive and temperature sensors are described. These circuits have been also implemented as discrete element PCBs, using commercial components and sometimes, in the case of integrated circuit design, with LV LP characteristics, in a standard CMOS technology.
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De Marcellis, A., Ferri, G. (2011). The Voltage-Mode Approach in Sensor Interfaces Design. In: Analog Circuits and Systems for Voltage-Mode and Current-Mode Sensor Interfacing Applications. Analog Circuits and Signal Processing. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9828-3_3
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DOI: https://doi.org/10.1007/978-90-481-9828-3_3
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