CSIT-304 - Digital Circuits & System (DSC)

Convert the following decimal numbers to the indicated bases:

i) $(516)_{10} = ()_{16}$

ii) $(250.5)_{10} = ()_{4}$

iii) $(2ED)_{16} = ()_{2}$

iv) Obtain the 9's and 10's complement of $(864)_{10}$.

Represent the decimal number 6 in

i) Excess-3 code

ii) BCD code

iii) Gray code

iv) 84-2-1 code

v) 2421 codes

Simplify the following expression as much as possible: $F(w,x,y,z) = y'z' + w'x'z' + w'xyz' + w'yz'$ and implement your result using universal gates only.

Express the following Boolean function F in a sum of min terms and a product of max terms. $F(X,Y,Z) = (XY + Z) (Y + XZ)$

What is the role of multiplexer in the digital electronics? Explain the logic how it selects a one input among several inputs?

Write a short note on decoder.

Draw a full subtractor circuit using NAND gate. alt=''

Explain race-around condition in relation to the J-K flip-flops using timing relationships. Draw the clocked Master-Slave J-K flip-flop configuration and explain how it removes race-around condition in J-K flip-flops? alt=''

Design a ripple decade counter using JK flip-flop. alt=''

Draw and explain 4-bit universal shift register. alt=''

With a neat diagram explain the operation of R-2R DAC. alt=''

Write a short note on PLA.

Describe the circuit and performance of CMOS inverter and state the characteristics of CMOS. alt=''

Draw the circuit diagram of Schmitt trigger and explain its working. alt=''

Write a short note on PCM.

Explain the geometrical representation of Non-orthogonal BFSK. alt=''