Solution Found!
Repeat 12.23 using NOR gates instead of NAND gates.
Chapter 12, Problem 12.24(choose chapter or problem)
Repeat Problem 12.23 using NOR gates instead of NAND gates.
Questions & Answers
QUESTION:
Repeat Problem 12.23 using NOR gates instead of NAND gates.
ANSWER:Step 1 of 9
Consider the truth table to design decade counter (BCD) using the excess 3 code for decimal digits.
As shown in table 1, the excess 3 BCD system is created by adding 0011 to each binary value. For example, in excess-3 value, the decimal number 7, which is coded as 0111 in BCD, is coded as 0111+0011=1010.
Decimal Number |
BCD number |
Excess-3 Number |
Excess-3 Decimal Number |
||||||
A |
B |
C |
D |
A + |
B + |
C + |
D + |
||
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
1 |
3 |
1 |
0 |
0 |
0 |
1 |
0 |
1 |
0 |
0 |
4 |
2 |
0 |
0 |
1 |
0 |
0 |
1 |
0 |
1 |
5 |
3 |
0 |
0 |
1 |
1 |
0 |
1 |
1 |
0 |
6 |
4 |
0 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
7 |
5 |
0 |
1 |
0 |
1 |
1 |
0 |
0 |
0 |
8 |
6 |
0 |
1 |
1 |
0 |
1 |
0 |
0 |
1 |
9 |
7 |
0 |
1 |
1 |
1 |
1 |
0 |
1 |
0 |
10 |
8 |
1 |
0 |
0 |
0 |
1 |
0 |
1 |
1 |
11 |
9 |
1 |
0 |
0 |
1 |
1 |
1 |
0 |
0 |
12 |
10 |
1 |
0 |
1 |
0 |
1 |
1 |
0 |
1 |
13 |
11 |
1 |
0 |
1 |
1 |
1 |
1 |
1 |
0 |
14 |
12 |
1 |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
15 |
13 |
1 |
1 |
0 |
1 |
X |
X |
X |
X |
X |
14 |
1 |
1 |
1 |
0 |
X |
X |
X |
X |
X |
15 |
1 |
1 |
1 |
1 |
X |
X |
X |
X |
X |
Table 1: Excess 3 code conversion table
Here, the decade counter decimal digit is 1001 have 1100.