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- W2896675180 abstract "This paper presents the implementation of a digital calibration method for a variable-gain amplifier (VGA), where the amplifier input offset voltage is the calibration target. The whole system is implemented in 130 nm CMOS technology using the supply voltage of 600 mV. Firstly,fundamentals of calibration circuitry operation are described, followed by detailedexplanation of the proposed implementation. Then, investigation of possible undesired effects of calibration circuitry on the amplifier characteristics is performed. The whole calibration system wasverified through simulation for various temperatures using Cadence environment and BSIM3v3 transistor model version. The VGA was calibrated within the temperature range from $- 20 ^{circ}C$ to $60 ^{circ}C$, in which standard deviation of the inputoffset voltage reaches less than $802 mu V$ and mean value is at most $450 mu V$. Using the calibration, the standard deviation is reduced to 35% compared to the VGA without the calibration, while the change of mean value is rather negligible." @default.
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- W2896675180 date "2018-09-01" @default.
- W2896675180 modified "2023-09-24" @default.
- W2896675180 title "Digital Calibration of Operational Amplifiers and Influence of Calibration Circuitry" @default.
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- W2896675180 doi "https://doi.org/10.23919/ae.2018.8501432" @default.
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