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Get Answers to all your Questions
- #NCERT
- #CBSE 12 Class
- #Semiconductor Electronics: Materials, Devices and Simple Circuits
- #Physics
- #Physics Part II Textbook for Class XII
Q. 14.15 Write the truth table for the circuits given in Fig. 14.40 consisting of NOR gates only. Identify the logic operations (OR, AND, NOT) performed by the two circuits.
Figure 14.40
Answers (1)
a)
A is the two input of the NOR gate and Hence Output Y is:
Y =
Y =
Hence circuit functions as a NOT gate.
TRUTH TABLE:
| INPUT | OUTPUT |
| 0 | 1 |
| 1 | 0 |
b) A is the two input of a NOR gate whose output(which is ) is the one input of another NOR gate. B is the two input of NOR gate whose output (which is
) is the input of another NOR gate. Hence,
Y =
Y = .
Y = A.B
Hence it functions as AND gate.
TRUTH TABLE:
| INPUTS | OUTPUT |
| 00 | 0 |
| 01 | 0 |
| 10 | 0 |
| 11 | 1 |
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