1

GATE ECE 2018

MCQ (Single Correct Answer)

+2

-0.67

A 2 $$ \times $$ 2 ROM array is built with the help of diodes as shown in the circuit below. Here W

During the read operation, the selected word line goes high and the other word line is in a high impedance state. As per the implementation shown in the circuit diagram above, what are the bits corresponding to D

_{0}and W_{1}are signals that select the word lines and B_{0}and B_{1}are signals that are output of the sense amps based on the stored data corresponding to the bit lines during the read operation.During the read operation, the selected word line goes high and the other word line is in a high impedance state. As per the implementation shown in the circuit diagram above, what are the bits corresponding to D

_{ij}(where i = 0 or 1 and j = 0 or 1) stored in the ROM?2

GATE ECE 2014 Set 3

MCQ (Single Correct Answer)

+2

-0.6

If WL is the Word Line and BL the Bit Line, an SRAM cell is shown in

3

GATE ECE 2003

MCQ (Single Correct Answer)

+2

-0.6

In the circuit shown in Figure, A is a parallel in, parallel-out 4-bit register, which loads at the rising edge of the clock C. The input lines are connected to a 4-bit bus, W. Its output acts as the input to a 16×4 ROM whose output is floating when
the enable input E is 0. A partial table of the contents of the ROM is as follows

The clock to the register is shown, and the data on the W bus at time t$$_1$$ is 0110. The data on the bus at time t$$_2$$ is

4

GATE ECE 2002

MCQ (Single Correct Answer)

+2

-0.6

If the input X$$_3$$, X$$_2$$, X$$_1$$, X$$_0$$ to the ROM in figure 2.12 are 8-4-2-1 BCD numbers, then the outpus are Y$$_3$$,Y$$_2$$, Y$$_1$$, Y$$_0$$ are

Questions Asked from Semiconductor Memories (Marks 2)

Number in Brackets after Paper Indicates No. of Questions

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

Control Systems

Digital Circuits

General Aptitude

Electronic Devices and VLSI

Analog Circuits

Engineering Mathematics

Microprocessors

Communications

Electromagnetics