re designing circuit using combination logic

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redesign the combination lock machine of table 7-14 assigning coded states in gray -code order (A-H 000,001,011,010,110,111,101,100). compare the cost of the resulting sum-of-products excitation equations with the ones derived in text.


meaning s 0 1

got zip A B,01 A,00

got 0 B B,00 C.01

got 01 C B,00 D,01

got 011 D E, 01 A,00

got 0110 E B,00 F,01

got 01101 F B,00 G,01

got 011011 G E, 00 H,01

got 0110111 H B,11 A,00


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