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A digital pixel image sensor for real-time readout

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3 Author(s)
Andoh, F. ; NHK Sci. & Tech. Res. Labs., Tokyo, Japan ; Shimamoto, H. ; Fujita, Y.

An experimental digital image sensor that converts analog video signals into 8-bit digital signals for each unit pixel, and reads out the signals at an operating clock of standard TV has been developed. Each pixel is equipped with a photodiode, a 1-bit analog-to-digital converter (1-bit ADC), an 8-bit pulse counter, and a signal processing circuit. The sensor system displays a two-dimensional (2-D) image in real time. The 1-bit ADC has a dynamic range of 110 dB at an operating voltage of 1.3 V. “Knee” characteristics and the results of an investigation into random noise sources in the circuit are also described

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Electron Devices, IEEE Transactions on  (Volume:47 ,  Issue: 11 )