2_1_2_DIGIT_INPUT_FOR_199_COUNT

Published:2009/6/30 3:08:00 Author:May | From:SeekIC

Addition of 1/2-digit circuit to basic 2-digit BCD DAC increases countfrom 99 to 199，Circuit sequencesto 99 while 1/2-digitsection of MC14009 hex two-output NOR gate has low output, and goes through steps 100 to 199 while 1/2-digit output is high Reference voltage is 5.0 V. Calibration procedure is given.—T.Henry,Binary D/A Converters Can Provide BCD-Coded Conversion,EDN Magazine， Aug．5, 1973, p 70－73.



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