Print Email Facebook Twitter A CMOS-Imager-Pixel-Based Temperature Sensor for Dark Current Compensation Title A CMOS-Imager-Pixel-Based Temperature Sensor for Dark Current Compensation Author Xie, S. (TU Delft Electronic Instrumentation) Abarca Prouza, A.N. (TU Delft Electronic Instrumentation) Theuwissen, A.J.P.A.M. (TU Delft Electronic Instrumentation; Harvest Imaging) Date 2020 Abstract This brief proposes employing each of the classical 4 transistor (4T) pinned photodiode (PPD) CMOS image sensor (CIS) pixels, for both imaging and temperature measurement, intended for compensating the CISs' dark current, and dark signal non-uniformity (DSNU). The proposed temperature sensors rely on the thermal behavior of MOSFETs working in subthreshold region, when biased with ratiometric currents sequentially. Without incurring any additional hardware or penalty to the CIS, they are measured to have thermal curvature errors less than ±0.3 °C and 3sigma process variations within ±1.3 °C, from 108 sensors on 4 chips, over a temperature range from -20 °C to 80 °C. Each of them consumes 576 nJ/conversion at a conversion rate of 62 samples/s, when quantized by 1 st-order 14 bit delta-sigma ADCs and fabricated using 0.18mu text{m} CIS technology. Experimental results show that they facilitate digital compensation for average dark current and DSNU by 78% and 20%, respectively. Subject Temperature sensorsTemperature measurementCalibrationDark currentSemiconductor device measurementdelta-sigma (Delta-sigma) modulatorCMOS image sensor (CIS)temperature compensationdark currentDSNUdelta-sigma (Δ-σ) modulator To reference this document use: http://resolver.tudelft.nl/uuid:92e5089f-2e23-4103-aa5d-09b7beb2cb80 DOI https://doi.org/10.1109/tcsii.2019.2914588 ISSN 1549-7747 Source IEEE Transactions on Circuits and Systems Part 2: Express Briefs, 67 (2), 255 - 259 Bibliographical note Accepted author manuscript Part of collection Institutional Repository Document type journal article Rights © 2020 S. Xie, A.N. Abarca Prouza, A.J.P.A.M. Theuwissen Files PDF TCASII_final.pdf 1.31 MB Close viewer /islandora/object/uuid:92e5089f-2e23-4103-aa5d-09b7beb2cb80/datastream/OBJ/view