Exercise :: Digital Electronics - Section 6
- Digital Electronics - Section 1
- Digital Electronics - Section 2
- Digital Electronics - Section 3
- Digital Electronics - Section 4
- Digital Electronics - Section 5
- Digital Electronics - Section 6
- Digital Electronics - Section 7
- Digital Electronics - Section 8
- Digital Electronics - Section 9
- Digital Electronics - Section 10
- Digital Electronics - Section 11
- Digital Electronics - Section 12
- Digital Electronics - Section 13
- Digital Electronics - Section 14
- Digital Electronics - Section 15
- Digital Electronics - Section 16
- Digital Electronics - Section 17
- Digital Electronics - Section 18
- Digital Electronics - Section 19
- Digital Electronics - Section 20
- Digital Electronics - Section 21
- Digital Electronics - Section 22
- Digital Electronics - Section 23
- Digital Electronics - Section 24
| 41. | Out of 5 M x 8, 1 M x 16, 2 M x 16 and 3M x 8 memories, which memory can store more bits? |
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Answer: Option A Explanation: Bits are 40 M, 16 M and 32 M. |
| 42. | A 6 bit ladder A/D converter has input 101001. The output is (assume 0 = 0 V and 1 = 10 V) |
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Answer: Option B Explanation: Output = |
10 j 6.41 V.| 43. | A ripple counter has 4 bits and uses flip flops with propagation delay time of 25 ns. The maximum possible time for change of state will be |
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Answer: Option D Explanation: In ripple counter all the delays are added. |
| 44. | A counter has a modulus of 10. The number of flip flops is |
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Answer: Option C Explanation: 23 = 8 and 24 = 16 Therefore 4 flip-flops are needed. Some states will be skipped to give a modulus of 10. |
| 45. | The counter shown in the given figure is built using 4 -ve edge triggered toggle FFs. The FF can be set asynchronously when R = 0. The combinational logic required to realize a modulo-13 counter is |
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Answer: Option A Explanation: Counter is modulo-13, it will count up to 15 but due to mod-13, it will be reset at 13, (13)10 = (1101 )2 = Q4 Q3 Q2 Q1. |
