A 200-mW, 3.3-V, CMOS color camera IC producing 352×288 24-bvideo at 30 frames/s

摘要

A digital color camera has been monolithically realized in anstandard 0.8-Μm CMOS technology. The chip integrates a 353×292nphotogate sensor array with a unity-gain column circuit, a hierarchicalncolumn multiplexer, a switched-capacitor programmable-gain amplifier,nand an 8-b flash analog/digital converter together with digital circuitsnperforming color interpolation, color correction, computation of imagenstatistics, and control functions. The 105-mm2 chip producesn24-b RGB video at 30 frames/s. The sensor array achieves a conversionngain of 40 ΜV/electron and a monochrome sensitivity of 7nV/lux·s. For a 33-ms exposure time, the camera chip achieves andynamic range of 65 dB and peak-to-peak fixed pattern noise that is 0.3%nof saturation. Digital switching noise coupling into the analog circuitsnis shown to be data independent and therefore has no effect on imagenquality. Total power dissipation is less than 200 mW from a 3.3 V supply