A NOVEL RETINA CHIP WITH SIMPLE WIRING FOR EDGE EXTRACTION

A novel silicon retina chip based on the information processing in the vertebrate retina was designed and fabricated, The chip has a novel w iring structure in which all pixels are connected through the channel of MOS transistors, which simplifies a wiring structure compared with conventional resistive networks, The proposed structure minimizes the pixel area and certainly increases a fill factor since each pixel cons ists of only two photodiodes and three MOS transistors, Experimental r esults showed that the chip could extracted the edge of input images s uccessfully, Furthermore, it was shown that the chip could operate ove r a wide range of light intensities by adjusting its spatial resolutio n.