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A programmable calibration circuit for sensors is proposed in this paper. It carries out gain and offset compensation by adding or subtracting appropriate correction factors to the transfer function of each sensor. Digital programmability makes it possible to automate calibration, paving the way for batch calibration. The circuit was designed for a specific sensor structure, a MIM-ISFET, which was...
A programmable calibration circuit for sensors is proposed in this paper, which carries out an offset compensation by adding an appropriate correction factor to the transfer function of each sensor. The circuit was designed for a specific sensor structure, a MIM-ISFET, which was modeled in HSpice. The proposed scheme reduces the offset error due to process variations of both the sensor and the interface...
A circuit for calibrating the output response of sensors is proposed in this paper. It is based on the Progressive Polynomial Method and is intended to be integrated, whenever possible, with the sensor itself in the same chip. The proposed circuit was designed for a specific sensor, a MIM-ISFET, which was modeled in HSpice. The calibration circuit reduces the error in the output signal due to process...
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