GATE ECE 2024 | Combinational Circuits Question 1 | Digital Circuits

GATE ECE 2024

MCQ (Single Correct Answer)

-1.33

A 4-bit priority encoder has inputs $D_3, D_2, D_1,$ and $D_0$ in descending order of priority. The two-bit output $AB$ is generated as 00, 01, 10, and 11 corresponding to inputs $D_3, D_2, D_1,$ and $D_0$, respectively. The Boolean expression of the output bit $B$ is _______.

$\overline{D_3} ~\overline{D_2}$

$\overline{D_3} D_2 + \overline{D_3}~ \overline{D_1}$

${D_3} \overline{D_2} + \overline{D_3} D_1$

$D_3+\overline{D}_2 D_1$

GATE ECE 2024

MCQ (Single Correct Answer)

-1.33

The propagation delay of the 2 x 1 MUX shown in the circuit is 10 ns. Consider the propagation delay of the inverter as 0 ns.

GATE ECE 2024 Digital Circuits - Combinational Circuits Question 1 English

If S is set to 1 then the output Y is _______.

a square wave of frequency 100 MHz

a square wave of frequency 50 MHz

constant at 0

constant at 1

GATE ECE 2018

MCQ (Single Correct Answer)

-0.67

A four-variable Boolean function is realized using 4 $$ \times $$ 1 multiplexers as shown in the figure.

GATE ECE 2018 Digital Circuits - Combinational Circuits Question 5 English

The minimized expression for F(U, V, W, X) is

$$\left( {UV + \overline U \overline V } \right)\overline W $$

$$\left( {UV + \overline U \overline V } \right)\left( {\overline W \overline X + \overline W X} \right)$$

$$\left( {U\overline V + \overline U V} \right)\overline W $$

$$\left( {U\overline V + \overline U V} \right)\left( {\overline W \overline X + \overline W X} \right)$$

GATE ECE 2017 Set 2

MCQ (Single Correct Answer)

-0.6

A programmable logic array (PLA) is shown in the figure. GATE ECE 2017 Set 2 Digital Circuits - Combinational Circuits Question 19 English

The Boolean function F implemented is

$$\overline P \,\overline {Q\,} R + \overline P QR + P\overline {Q\,} \overline R $$

$$(\overline P \, + \overline {Q\,} + \,R)(\overline P \, + Q + R) + (P + \overline P \, + \overline R )$$

$$\overline P \,\overline {Q\,} R + \overline P QR + P\overline {Q\,} \,\overline R $$

$$(\overline P + \,\overline {Q\,} \, + R)(\overline P + Q + R) + (P + \overline {Q\,} + R)$$

GATE ECE Subjects

Signals and Systems

Representation of Continuous Time Signal Fourier Series Fourier Transform Continuous Time Signal Laplace Transform Discrete Time Signal Fourier Series Fourier Transform Discrete Fourier Transform and Fast Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Discrete Time Linear Time Invariant Systems Transmission of Signal Through Continuous Time LTI Systems Sampling Transmission of Signal Through Discrete Time Lti Systems Miscellaneous

Network Theory

State Equations For Networks Network Elements Network Theorems Two Port Networks Transient Response Sinusoidal Steady State Response Network Graphs Miscellaneous

Control Systems

Signal Flow Graph and Block Diagram Time Response Analysis Compensators Basic of Control Systems Frequency Response Analysis Stability Root Locus Diagram State Space Analysis

Digital Circuits

Number System and Code Convertions Boolean Algebra Logic Gates Combinational Circuits Sequential Circuits Semiconductor Memories Logic Families Analog to Digital and Digital to Analog Converters

General Aptitude

Numerical Ability Logical Reasoning Verbal Ability

Electronic Devices and VLSI

Semiconductor Physics PN Junction BJT and FET IC Basics and MOSFET

Analog Circuits

Diodes Bipolar Junction Transistor Frequency Response FET and MOSFET Oscillators Operational Amplifier Feedback Amplifier Power Amplifier 555 Timer

Engineering Mathematics

Linear Algebra Calculus Vector Calculus Complex Variable Probability and Statistics Differential Equations Numerical Methods Transform Theory

Microprocessors

Pin Details of 8085 and Interfacing with 8085 Instruction Set and Programming with 8085

Communications

Fundamentals of Information Theory Noise In Digital Communication Analog Communication Systems Digital Communication Systems Random Signals and Noise

Electromagnetics

Waveguides Antennas Miscellaneous Transmission Lines Maxwell Equations Uniform Plane Waves