That's a great resource, here is another that has more visuals on sensors and how they work. https://graphics.stanford.edu/courses/cs448a-10/sensors-noise-14jan10-opt.pdf
Edit: Page 36 is where signal to noise ratio is directly addressed.
That's a great resource, here is another that has more visuals on sensors and how they work. https://graphics.stanford.edu/courses/cs448a-10/sensors-noise-14jan10-opt.pdf
Edit: Page 36 is where signal to noise ratio is directly addressed.