Title : Signal Synchronization in 225MP Stitched Sensor
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Signal Synchronization in 225MP Stitched Sensor
Japan IEICE Electronics Express paper "A synchronous driving approach based on adaptive delay phase-locked loop for stitching CMOS image sensor" by Zhongjie Guo, Ningmei Yu, and Longsheng Wu from Xi’an University of Technology and Xi’an Microelectronic Technology Institute, China, proposes signal delay compensation circuit for long connections in a large sensor."A synchronous driving approach for stitching CMOS image sensor is proposed. Dual row signal line driving architecture must be considered in the design of large array CMOS image sensor. However, as the size of the array increases further, the traditional synchronization technologies such as clock tree cannot be applied because of the stitch technology, Furthermore, this invalidity will cause DC shoot through and dead line. Based on the adaptive delay phase-locked loop, dual row signal line synchronous driver for pixel array is realized in a single die CMOS image sensor with 225M pixels and large area of 120×120mm2. Timing matching improves by two orders of magnitude, and 99.95% consistency is achieved."
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