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प्रश्न
Answer the following question :
Distinguish between digital and analogue signals.
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उत्तर
| Digital Signals | Analogue Signals |
| 1. They are discontinuous functions of time or discrete time signals. | 1. They are continuous functions of time. |
| 2. They use discrete values to represent information. They are represented by square waves. | 2. They use a continuous range of values to represent information. They are represented by sine waves or other continuous graphs. |
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संबंधित प्रश्न
Write the truth table for a NAND gate connected as given in the following figure.
Hence identify the exact logic operation carried out by this circuit
Give the truth table and circuit symbol for NAND gate
Let \[X = A \overline{ BC} + B\overline{ CA} + C\overline{AB } .\] Evaluate X for A = B = C = 0.
Design a logical circuit using AND, OR and NOT gates to evaluate \[A \overline { BC } + B \overline{ CA }\] .
Draw a diagram to show how NAND gates can be combined to obtain an OR gate. (Truth table is not, required)
Useful Constants and Relations:
| 1. | Charge of a proton | (e) | =1.6 × 10-19C |
| 2. | Planck's constant | (h) | = 6·6 × 10-34 Js |
| 3. | Mass of an electron | (m) | = 9·1× 10-31 kg |
| 4. | Permittivity of vacuum | (∈0) | =8 · 85 × 10-12 Fm-1 |
| 5. | `(1/(4pi∈_0))` | =9 ×109 mF-1 | |
| 6. | Permeability of vacuum | (μ0) | = 4π × 10-7 Hm-1 |
| 7. | `((mu_0)/(4pi))` | =1 × 10-7 Hm-1 | |
| 8. | Speed of light in vacuum | (c) | = 3× 108 ms-1 |
| 9. | Unified atomic mass unit | (u) |
= 931 MeV |
| 10. | Electron volt | (leV) | = 1.6 × 10-19 J |
A radar is sending out pules of 1 micro second duration at interval of 100 micro-second. The range of the radar is
For the given circuit, the input digital signals are applied at terminals A, B, and C. What would be the output at terminal y?
How would you set up a circuit to obtain NOT gate using a transistor?
An X-OR gate has following truth table:
| A | B | Y |
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
It is represented by following logic relation `Y = barA.B + A.barB`. Build this gate using AND, OR and NOT gates.
Which of the following gives a reversible operation?
