FTG is a pixel concept that enables non-destructive readout in plain CMOS (CIS) pixels. By repeating the measurement multiple times, the accuracy of the photocharge readout improves with the square root of the number of repetitions. Figure 1 illustrates schematic cross section of a FTG pixel next to NFTG.
Caeleste measured 0.25 electrons RMS noise using FTG (Floating Transfer Gate) pixel technology.
