Patent US 4,167,754

A solid state television camera with a noise eliminating circuit includes a solid state image sensor of semiconductor material to provide an output signal in correspondence to the image of an object projected thereon; a memory to memorize the positions of crystal defects in the semiconductor material; and a control circuit responsive to the output of the memory for eliminating from the output signal of the solid state image sensor noise due to crystal defects in the semiconductor material. The position of the first of the crystal defects encountered in the raster is determined by the distance, measured either along the successive scanning lines or along the orthogonal axes of the raster, between a reference point and such first crystal defect and that distance is encoded and memorized in the memory. The position of any other crystal defect is determined by the similarly measured distance between such other crystal defect and the crystal defect prior thereto, which distance is also encoded and memorized in the memory.