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प्रश्न
Write the truth table for the circuit shown in figure. Name the gate that the circuit resembles.
उत्तर
This is ‘AND’ Gate and its characteristics are as follows:
(1) It has two inputs (A and B) and only one output (Y).
(2) Boolean expression us Y = A·B is read as "Y equals A AND B".
(3) Realization of AND gate
Logical symbol of AND gate
(i) A = 0, 8 = 0
The voltage supply through R is forward biasing diodes D1 and D2 (offers low resistance), the voltage V would drop across R. The output voltage at Y = the voltage across diode = 0
(ii) A = 0, B = 1
D1 = Conducts, D2 = Not Conducts
The out voltage at Y = The voltage across the diode (D1) = 0
(iii) A = 1, B = 0
D1 = Conducts, D2 = Not conducts
The out voltage at Y = The voltage across the diode (D2) = 0
(iv) A = 1, B = 1
None of the diode conducts
The out voltage at Y = Battery voltage = 1
(4) Truth table for ‘AND’ gate
| A | B | V0 = A · B |
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
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संबंधित प्रश्न
The output of NOR gate is high, when _______.
The following figure shows the input waveforms (A, B) and the output waveform (Y) of a gate. Identify the gate, write its truth table and draw its logic symbol.
The logic gate which produces LOW output when one of the input is HIGH and produces
HIGH output only when all of its inputs are LOW is called _______.
(A) AND gate
(B) OR gate
(C) NOR gate
(D) NAND gate
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 the schematic symbols for AND, OR, NOT and NAND gate
Name the logic gate which generated high output when at least one input is high.
Why are NOR gates considered as universal gates?
You are given circuit as shown in the figure, which consists of NAND gate. Identify the logic operation carried out by the two. Write the truth table. Identify the gates equivalent to the tow circuits.
Which logic gate is similar to a function of two series switches?
In the logic circuit shown in the figure, if input A and B are 0 to 1 respectively, the output at Y would be 'x'. The value of x is ______.
