At least as a schematic, showing a photodiode, 3 MOSFET transistors, and 2 voltage sources. The key element is the photodiode (indicated by the 2 siggly arrows) since it is what is affected by how much light hits it. This would be a CMOS pixel. Put 12,000,000 to 18,000,000 more of these schematics on a sensor chip behind a Bayer Array to generate color info, and an anti-aliasing/low pass filter. Add some other dodads like an low-noise amplifier array and an analog-to-digital converter and you can send image data to an on-camera image processor to at least de-mosaic the data, interpolate the Bayer Array influence and then write the results of all the number crunching to a memory card. File:Aps pd pixel schematic.svg - Wikipedia, the free encyclopedia I, Gargan, the copyright holder of this work, hereby release it into the public domain. This applies worldwide. In case this is not legally possible: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.