A 0.5 V PWM CMOS Imager With 82 dB Dynamic Range and 0.055% Fixed-Pattern-Noise

  title={A 0.5 V PWM CMOS Imager With 82 dB Dynamic Range and 0.055% Fixed-Pattern-Noise},
  author={Meng-Ting Chung and Chin-Lin Lee and Chin Yin and Chih-Cheng Hsieh},
  journal={IEEE Journal of Solid-State Circuits},
This paper presents a 0.5 V operated pulse-width modulation (PWM) CMOS imager with threshold-variation canceling (TVC) and programmable current-controlled threshold (PCCT) schemes implemented in 0.18 μm CMOS technology. The proposed TVC scheme efficiently improves the fixed-pattern-noise (FPN) issue caused by process variation in conventional PWM sensors. The limited dynamic range in ultra-low-voltage operated sensor can be extended by 56.5 dB with the proposed PCCT operation. The measurement… CONTINUE READING
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