AUTOMATIC RESPONSIVITY CONTROL FOR A CCD IMAGER

摘要

Nearly uniform responsivity in a charge coupled device infrared photodetector array is achieved by a charged coupled device automatic responsivity control circuit, including a subtractor (56), a multiplier (70) and a subtractor (84). The subtractor (56) establishes a reference level which is multiplied with the signal in the multiplier (70), the product being subtracted from a second reference level in the subtractor (84). The resulting signal is free of distortions due to nonuniform responsivities among the detectors in the infrared photodetector array, a significant advantage.