Method and apparatus for dark level integration of image sensor without integrating bad pixels

摘要

An apparatus for dark level integration comprises a programmable gain amplifier for amplifying signal levels from the pixel. A calibration signal generator for receiving a first calibration signal and a bad pixel signal to generation a second calibration signal, wherein the second calibration signal indicates the existence of the bad pixel. A dark current calibration integrator couples to the programmable gain amplifier and the calibration signal generator for receiving the amplified signal levels from the programmable gain amplifier and the second calibration signal to generate a control signal to the programmable gain amplifier.