Multi-sampling CMOS image sensor pixel structure and ultra-high speed image acquisition method thereof
A technology of image sensor and pixel structure, which is applied in image communication, electrical components, television, etc., can solve the problems of poor imaging performance, complex process, high cost, etc., and achieve the goal of small process change, low implementation difficulty, and reduced development cost Effect
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[0036] The pixel structure of the multi-sampling CMOS image sensor provided by the present invention is compatible with figure 1 The difference in the pixel structure of the traditional CMOS image sensor shown is that a photodiode of the present invention is connected to multiple control switch tubes and multiple floating diffusion capacitors, and the image signal generated by the photodiode can be sampled and buffered in time to obtain Multiple high time resolution image data.
[0037] The following takes a four-port sampling CMOS image sensor pixel structure model as an example to describe the present invention in detail:
[0038] Such as figure 2 As shown, four gate valves are evenly distributed around the photodiode, and each gate valve is connected to a floating diffusion capacitor. The four floating diffusion capacitors share a control transistor circuit, which is controlled by four charge output gate switches. The time-sharing transmission of the floating diffusion area cap...
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