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数字电路与逻辑设计课后习题答案蔡良伟(第三版)

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=BD(A+C)+B(C+CD)+AD =ABD+B(CD+C+D)+AD =B(AD+D)+CB+AD =(AB+BD+AD)+CB

=AB+AD+BC

(8)A?B?B?C?C?D?AB?BC?CD?DA 证:原式=AB?AB?BC?BC?CD?CD

=AB?BC?CD?AB?BC?CD?AD?DA

=AB?BC?CD?DA?AB?BC?CD?AD

=AB?BC?CD?DA?AB?BC?CD?DA =AB?BC?CD?DA

1-7

(1)F1=ABC+ABC

F1?A?B?C(A?B?C) (2)F2=A(B+C)+C(B+D) F2?A?BC(C?BD) (3)F3=(A+B)(C+D)

??

??

F3?AB?CD

(4)F4=(AB+CD)(B+AD)

F4??A?B??C?D??B?A?D?

(5)F5=AB+ACB+D

F5??A?B?A?C?BD

??(6)F6=A+BC+B+CD

F6?A?B?C?BC?D

(7)F7=AC+BDC+A+BD

F7??A?C??B?D??CAB?D

(8)F8=(A+D)(B+C)+(A+C+B)AB+CD

F8?AD?BCACB??A?B??C?D?

1-8

(1)F1=AB+CD

F1'=(A+B)(C+D)

(2)F2=(A+B)(C+D)

F2'=AB+CD

(3)F3=A(B+D)+B(A+C)

F3'=(A+BD)(B+AC)

(4)F4=(A+BCD)(ABC+D)

F4'=A(B+C+D)+(A+B+C)D

(5)F5=A+B+C+D

F5'=ABCD

(6)F6=BC+CDB(AD+C)

F6'=(B+C)(C+D)+B+(A+D)C

(7)F7=BC+ADAC+C+AB

F7'=(B+C)(A+D)+A+CCA+B

(8)F8=ABC+A+CD(BD+C)+(BC+A+D)B+A+BC

F8'=(A+B+C)A(C+D)+(B+D)C(B+C)AD+BA(B+C)

1-9

(1)F1=ABC+ABC+ABC+ABC

A B C F0 0 0 10 0 100 1 000 1 111 0 001 0 111 1 001 1 11 (2)F2=A+BC+CD

A B C DFA B C DF0 0 0 001 0 0 010 0 0 101 0 0 110 0 1 001 0 1 010 0 1 111 0 1 110 1 0 001 1 0 010 1 0 101 1 0 110 1 1 011 1 1 010 1 1 111 1 1 11(3)F3=AB+B(C+AD)

ABC000111100101010110ABCD00011110000010010011111111101111

A B C D0 0 0 00 0 0 1F00A B C D1 0 0 01 0 0 1F01ABCD000111100 0 1 011 0 1 010 0 1 111 0 1 110 1 0 011 1 0 000 1 0 111 1 0 100 1 1 011 1 1 000 1 1 111 1 1 10

4)F4=(A+B+C)(A+B+C)(A+B+C)A B C F0 0 0 10 0 110 1 000 1 111 0 001 0 101 1 011 1 11 5)F5=(BD+C)(C+AD)

000011011111110000100111ABC000111100111010011

(A B C DFA B C DF0 0 0 001 0 0 000 0 0 101 0 0 110 0 1 011 0 1 010 0 1 111 0 1 110 1 0 001 1 0 000 1 0 101 1 0 100 1 1 011 1 1 010 1 1 111 1 1 11 6)F6=(AB+CD)(BC+DA)(AC+BD)A B C DFA B C DF0 0 0 001 0 0 000 0 0 101 0 0 100 0 1 001 0 1 000 0 1 101 0 1 100 1 0 001 1 0 000 1 0 101 1 0 100 1 1 001 1 1 000 1 1 101 1 1 10

7)F7=A+BC+BA+C+D

ABCD00011110000011010011110011100111ABCD00011110000000010000110000100000

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