Dark Current and Signal-to-Noise Ratio in BDJ Image Sensors

In this paper, analytical expressions of dark currents and equivalent noise generators of a CMOS color image sensor are presented, and the signal-to-noise ratio (SNR) at both outputs is evaluated. Static measurements and simulations on Austria Micro Systems 0.35-<formula formulatype="inline"><tex>$\mu\hbox{m}$</tex></formula> CMOS test structures yield guidelines to increase the SNR of the buried double junction photodetector.