Low frequency noise in CMOS PNP PIN phototransistors

Low frequency noise on six different types of CMOS PNP PIN phototransistors was investigated and is presented in this paper. The output noise spectral density is evaluated by a noise model for the investigated phototransistors. The current gain β and the most dominant shot noise terms including their values of each phototransistor are extracted. The presented phototransistors show a good noise performance.