FORGOTTEN DEVICE FOR INVALIDATING INFORMATION CONTAINED IN A MEMORY FROM SOME TIME AND RADAR COMPRISING SUCH A DEVICE

摘要

P THIS FORGOTTEN DEVICE 30 IS INTENDED TO INVALIDATE INFORMATION CONTAINED SINCE A CERTAIN TIME IN A MAJOR MEMORY MEMORY 1 ATTACHED TO READER ADDRESSING CIRCUITS 15, WRITING ADDRESSING CIRCUITS 13 AND ONE WRITE-READOUT CONTROL CIRCUIT 9. THIS DEVICE IS FORMED BY A FORGOTTEN RHYTHM GENERATOR 35, PROVIDING SIGNALS WHOSE PERIOD CORRESPONDS TO AUDIT SOMETIMES, BY TWO FORGOTTEN MEMORIES 37 AND 38 INCLUDING ADDRESSING INPUTS ARE COUPLED TO THESE READ AND WRITE ADDRESSING CIRCUITS, BY A WRITING CIRCUIT 45, 46 COOPERATING WITH THE READ-WRITE CONTROL CIRCUIT FOR WRITING AN UPDATE SIGNAL INTO TWO FORGOTTEN MEMORIES IN THE SAME TIME THE MAIN MEMORY IS WRITTEN BY AN ERASURE CIRCUIT 50-35-52-45-46 COMMAND WITH THE FORGOTTEN GENERATOR TO INSERT TURN ROUND IN ONE OF THE FORGOTTEN MEMORIES AFTER SOME TIME A SIGNAL D DELETION, BY A COINCIDENCE CIRCUIT 55 OF SI ERASING CLEARING BRANCHES OUT OF FORGOTTEN MEMORIES TO COMMAND AN INVALIDATION CIRCUIT 60 BRANCH OUT THE MAIN MEMORY. / P P APPLICATION: VISUALIZING RADAR IMAGES. / P