Design Techniques Evaluation to Mitigate RTS Noise Effect in Column ADC of 3D Stacked Image Sensors

ADC circuits may cause RTS column signatures in 3D stacked CMOS image sensors. This work proposes a statistical and design evaluation of RTS for 40nm node devices, used in ADC circuits. A transistor array mimicking 3T CIS pixel array architecture is used for RTS characterization, with a proposed RTS detection methodology and counting. The designs presented exhibit a noteworthy decrease in the number of RTS occurrences, as evidenced by the experimental results.