GRAPHIC INFORMATION READ-OUT DEVICE Russian patent published in 1994 - IPC

FIELD: automatics and computer engineering. SUBSTANCE: device is composed of a sound-conducting plate, two piezoelectric radiators, coordinate pick-up unit, three AND gates, two OR gates, two counters, pulse generator, single-shot multivibrator, three signal shapers, two flip-flops, amplifier, phase shifter, comparator and duration selector. The device is characterized by the use of new units and connections to enhance noise proofness. EFFECT: enhanced noise proofness. 1 dwg