CSIT-304 - Digital Circuits & System (DSC)

i) Add (83)$_{10}$ and (34)$_{10}$ in BCD.

ii) Convert the base-7 number (35614)$_7$ to base-12.

Explain how the basic gates can be realized using NOR gates?

Design a Half adder circuit with truth table and logic diagrams. alt=''

A combinational circuit is defined by the following Boolean functions. Design circuit with a decoder and external gates: $F_1(x, y, z) = x'y'z' + xz$ $F_2(x, y, z) = xyz' + x'z$

Explain the working of the master slave JK flip-flop.

Design a 3-bit binary UP/DOWN counter with a direction control M. Use T flip-flop. alt=''

Draw and explain the PMOS, NMOS and CMOS logic. alt=''

Explain how a Schmitt Trigger circuit works with a neat diagram. Design an Schmitt trigger with $V_{LT} = 2V$, $V_{UT} = -1V$. Assume $+V_{sat} = +13V$, $-V_{sat} = -13V$. alt=''

What is mutual information and how it is related to channel capacity? For a standard voice band communication channel the signal to noise ratio is 30dB and transmission bandwidth is 3 KHz. What will be the Shannon limit for information in bits/sec?

Explain BFSK modulation schemes.

Reduce the expression $Y = \Sigma m (1, 4, 8, 12, 13, 15) + d (3, 14)$ using K-maps and implement the real minimal expression using basic logic gates.

What are the different types of parallel adders? Explain carry save and carry look-ahead adders.

Derive the frequency of oscillation of an astable multivibrator using IC 555 timer. alt=''

Explain: DRAM and FLASH RAM.

An 8-bit D/A converter has a resolution of 10mV/bit. Find the analog output voltage for the inputs

i) 1001010

ii) 0001000

Describe the operation of dual slope A/D converter with necessary diagrams. alt=''