Selection of amplifier for optimized charge transfer in active pixel CMOS time of flight (TOF) image sensors

抄録

Although CMOS Time-of-Flight Range Image Sensors have been recently realized, the fabrication process is modified by inserting an extra mask layer to allow efficient TOF dependent charge transfer. This work focuses on the selection procedure of amplifiers to be used in the design of the TOF pixel using the standard CMOS process. From our analysis, it is found that the Cascode amplifier is the best amplifier to be used when compared to three other amplifiers. Simulation results show that the Cascode amplifier has a Charge Transfer Efficiency of 95.08% and power dissipation of 1.32µW, which enables the same charge transfer mechanism required for TOF imaging.