Digital Fundamentals — Summer 2023

Define the logic family properties:

fan in (ii) propagation delay (iii) power dissipation

Convert the following number to the given base:

(62) = (?) = (?)1028 (ii) (AFB) = (?) = (?)1628

Why NAND and NOR gates are called universal gates? Explain with appropriate example.

Explain the half subtractor with logic circuit.

Minimized the boolean expression using K-map f (A, B, C, D) = ∑m (0, 1, 5, 6, 7, 8, 9) + d(10, 11, 12, 13, 14, 15)

Design BCD to excess-3 converter.

Design a circuit which compare two binary number whether A>B, A=Bor A<B.

Draw the circuit of a J-Kflip-flop.

Describe the operation of a shift register with suitable diagram.

Design the four bit Johnson counter and explain the operation.

Explain different methods of Triggering of flip-flop.

What are qualitative differences between parallel loading and serial loading in shift registers?

Design a 3 bit synchronous counter using JK flip flop.

How can we describe the resolution of a D/Aconverter?

A 10-bit D/Aconverter provides an analog output which has a maximum value of 10.23 volts. Find the resolution of this D/Aconverter.

Explain the working of R-2R ladder type D/Aconverter.

Explain the types of A/Dconvertors.

A 10-bit D/Aconverter has a step-size of 10 mV. Determine the full-scale output voltage and the percentage resolution.1

Describe the successive approximation A/Dconversion principle with the neat diagram, explain this type of A/D converter.

Draw and explain the structure of a RAM cell.

Implement using PLA f = ∑m(0, 3, 4, 7)1 f = ∑m(3, 5, 6, 7)2

Discuss in brief semiconductor memory organization and its operation.

Compare the SRAMs and DRAMs.

Implement the following Boolean expressions using a PROM. f1 (x2, x1, x0) =  m (0, 1, 2, 5, 7) f2 (x2, x1, x0) =  m (1, 2, 4, 6)

What is a programmable LOGIC Array (PLA)? Describe with a logic diagram the principle of operation of a PLA. What are its advantages?