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This paper proposes a 256 × 256 time-of-flight (TOF) image sensor based on the center-tap (CT) demodulation pixel structure. The image sensor can capture both the two-dimensional (2D) high speed image and the three-dimensional (3D) depth image. The CT pixel consists of two split pinned photodiode (PPD) regions and two pairs of transfer transistors. The transfer transistors adopt a non-uniform doped...
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