DEVICE FOR LASER ADJUSTMENT OF RESISTORS Russian patent published in 1995 - IPC

FIELD: radio engineering. SUBSTANCE: invention deals with manufacture of precision film resistors. Device for laser adjustment of resistors has reference voltage source 1, comparator 2, resistance meter 3, analog-to-digital converter 4, shift register 5, first 2AND gate 6, multivibrator 7, 3AND gates (8-1.8-N), 2NOT-or gate 9, voltage-to-time converter 10, second 2AND gate 11, key 12, digital-to-analog converter 13, flip-flop 14, NOT gate 15, third 2AND gate 16, storage-and- retrieval unit 17, functional converter 18, laser 19, focusing system 20, adjusted resistor 21 and substrate holder 22. EFFECT: increased reliability and stability, reduced level of noises of film resistors. 1 dwg