Advertisements
Advertisements
प्रश्न
Write the truth table for the circuits given in following figure consisting of NOR gates only. Identify the logic operations (OR, AND, NOT) performed by the two circuits.
(a)
(b)
उत्तर
(a) A acts as the two inputs of the NOR gate and Y is the output, as shown in the following figure. Hence, the output of the circuit is `bar(A+A)`.
The truth table for the same is given as:
| A | Y`(=bar"A")` |
| 0 | 1 |
| 1 | 0 |
This is the truth table of a NOT gate. Hence, this circuit functions as a NOT gate.
(b) A and B are the inputs and Y is the output of the given circuit. By using the result obtained in solution (a), we can infer that the outputs of the first two NOR gates are `barA` and `barB` as shown in the following figure.
`bar"A" and bar "B"` are the inputs for the last NOR gate. Hence, the output for the circuit can be written as:
`"Y" = bar(bar"A" + bar"B") = bar(bar"A") . bar(bar"B") = "A.B"`
The truth table for the same can be written as:
| A | B | Y (=A⋅B) |
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
This is the truth table of an AND gate. Hence, this circuit functions as an AND gate.
APPEARS IN
संबंधित प्रश्न
Identify the logic gates marked 'P' and 'Q' in the given circuit. Write the truth table for the combination.
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
You are given the two circuits as shown in following figure. Show that circuit
- acts as OR gate while the circuit
- acts as AND gate.
(a)
(b)
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
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.
What will be the values of input A and B for the Boolean expression `overline ((A +B) .(A*B)) =1?`
Design a logical circuit using AND, OR and NOT gates to evaluate \[A \overline { BC } + B \overline{ CA }\] .
Show the variation of voltage with time, for a digital signal.
The outputs of two NOT gates are fed to a NOR gate. Draw the logic circuit of the combination of gates. Write its truth table. Identify the gate equivalent to this circuit.
You are given a circuit as shown in the figure, which consists of the NAND gate. Identify the logic operation carried out by the two. Write the truth table. Identify the gates equivalent to the tow circuit.
NAND and NOR gates are called universal gates primarily because they ______.
The current obtained from a simple filterless rectifier is
An oscillator is nothing but an amplifier with
In potential barrier development in a junction diode opposes
A CE amplifier has a voltage gain 50, an input impedance of 1000 ohm 1 and an output impedance of 200 ohm. The power gain of the amplifier will be
For the given circuit, the input digital signals are applied at terminals A, B, and C. What would be the output at terminal y?
Two car garages have a common gate which needs to open automatically when a car enters either of the garages or cars enter both. Devise a circuit that resembles this situation using diodes for this situation.
A logic gate circuit has two inputs A and B and output Y. The voltage waveforms of A, B and Y are shown below.
The logic gate circuit is ______.
