Digital logic Design MS Computer Science/MSc Computer Science/PhD Computer Science 3 Semester/Term Islamia University Bhawalpur (IUB) 2014
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Paper text
4
The Uslamia Unibersity of Bahawalpur, Pakistan
DEPARTMENT OF COMPUTER SCIENCE & IT
IUB Affiliated Colleges
Class: MCS (3rd Semester) Final Term
Subject: Digital Logic and Design
ustadni.
Time: 100 Minutes
Name: Nudrat Batool
Session: 2014-16
Code: CSIT 31102
Total Marks: 45
Roll. No. 2004
O2. Answer the following short questions.
(21)
7) Assume A,B, = 11 and A2 B=01. Compare these four bits with the circuit of Comparator and write
the answer after comparison.
2) What is Programmable Logic Devices (PLD)? How many types of PLD? Describe each type.
13) Define the gated SR-latch. Draw the circuit.
gartinel
4) Define and Draw J-K flip-flop.
5) Differentiate in Generic Array Logic (GAL) and Programmable Array Logic (PAL).
6r Write description of SD-RAM.
7) Write down applications of decoder and de multiplexer.
Long Questions: (Answer any three long questions from the following)
ra
Q.3: Determine the output carry Court, CouCours and Court of a Look-Ahead carry adder when Ginl = 1,
A, = 0, B, = 1, A2 = 0, B, = 0, A, -1, B3 = 1, A. - 1 and B. =
1.
/0.4: Define 4 line to 16 line Decoder, Draw its circuit and truth table.
Q. 5: What is a difference between Synchronous and Asynchronous Counters? Draw the circuits of 2 bit
Synchronous and Asynchronous Counters.
Q. 6: Describe the Encoder and Multiplexer with proper definitions, truth tables and logic diagrams.
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