Novel pixel calibration circuit for bolometer-type uncooled infrared image sensor
2016 International SoC Design Conference (ISOCC)(2016)
摘要
Lately, research on bolometer type uncooled infrared image sensor has been increasing for industrial applications. But it is hard to remove a Fixed Pattern Noise (FPN) of bolometer sensor. In this paper, a novel average-current calibration algorithm is presented for reducing bolometer resistance offset. A resistor which is produced standard CMOS process, on the average, has a deviation, respectively. We compensate for deviation of each active resistor using average-current calibration algorithm. The algorithm consists of as follows: bolometer pixel array, average current generator, current-to-voltage converters (IVCs), digital-to-analog converter (DAC), and analog-to-digital converters (ADCs). These bolometer-resistor array and readout circuit were designed and manufactured by 0.35μm standard CMOS process.
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关键词
average-current calibration,bolometer,resistance offset,readout circuit
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