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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 circuit given in figure below consisting of NOR gates and identify the logic operation (OR, AND, NOT) which this circuit is performing.
(Hint: A = 0, B = 1 then A and B inputs of second NOR gate will be 0 and hence Y=1. Similarly work out the values of Y for other combinations of A and B. Compare with the truth table of OR, AND, NOT gates and find the correct one.)
Draw logic symbol of an OR gate and write its truth table.
Let \[X = A \overline{ BC} + B\overline{ CA} + C\overline{AB } .\] Evaluate X for A = B = C = 1.
(i) Write the truth tables of the logic gates marked P and Q in the given circuit.
(ii) Write the truth table for the circuit.
With the help of a diagram, show how you can use several NAND gates to obtain an OR gate.
Useful Constants and Relations :
| 1. Speed of Light in Vacuum | (c) = 3.00 x 108 m/s |
| 2. Charge of a proton | (e) = 1.60 x 10-19C |
| 3. Planck's Constant | (h) = 6.6 x 10-34 Js |
| 4. Permeability of vacuum | (μ0) = 4π x 10-7 Hm-1 |
| 5. Electron Volt | (1eV ) = 1.6 x 10 |
| 6. Unified Atomic Mass Unit | (1u) = 931 MeV |
| (π) = 3.14 | |
| ( ln 2 ) = 0.693 |
The current obtained from a simple filterless rectifier is
The Boolean expression for NAND gate is
In potential barrier development in a junction diode opposes
Truth table for the given circuit (Figure) is ______.
How would you set up a circuit to obtain NOT gate using a transistor?
