12.21 Design a decade counter using the following 2-4-2-1 weighted code for decimal digits. Use NAND gates and the indicated flip-flop types. (a) Use D flip-flops. (b) Use J-K flip-flops. (c) Use T flip-flops. (d) Use S-R flip-flops. Digit 0 1 2 3 4 5 68992 7 ABCD 0000 0001 0010 0011 0100 1011 1100 1101 1110 1111

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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12.21 Design a decade counter using the following 2-4-2-1 weighted code for decimal
digits. Use NAND gates and the indicated flip-flop types.
(a) Use D flip-flops.
(b) Use J-K flip-flops.
(c) Use T flip-flops.
(d) Use S-R flip-flops.
Digit
0
1
2
3
4
5
6
7
8
9
ABCD
0000
0001
0010
0011
0100
1011
1100
1101
1110
1111
Transcribed Image Text:12.21 Design a decade counter using the following 2-4-2-1 weighted code for decimal digits. Use NAND gates and the indicated flip-flop types. (a) Use D flip-flops. (b) Use J-K flip-flops. (c) Use T flip-flops. (d) Use S-R flip-flops. Digit 0 1 2 3 4 5 6 7 8 9 ABCD 0000 0001 0010 0011 0100 1011 1100 1101 1110 1111
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