# Previous year question paper for DCLD (B-TECH computer science engineering 3rd)

## Digital circuits and logic design

### Previous year question paper with solutions for Digital circuits and logic design from 2005 to 2018

Our website provides solved previous year question paper for Digital circuits and logic design from 2005 to 2018. Doing preparation from the previous year question paper helps you to get good marks in exams. From our DCLD question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

PART-A

1. Number Systems: Binary, Octal, Decimal, Hexadecimal. Number base conversions, 1’s, 2’s, rth’s

complements, signed Binary numbers. Binary Arithmetic, Binary codes: Weighted BCD, Gray code, Excess 3

code, ASCII - conversion from one code to another. [5]

2. Boolean Algebra : Boolean postulates and laws - De-Morgan’s Theorem, Principle of Duality, Boolean

expression - Boolean function, Minimization of Boolean expressions - Sum of Products (SOP), Product of

Sums (POS), Minterm, Maxterm, Canonical forms, Conversion between canonical forms, Karnaugh map

Minimization, Quine-McCluskey method - Don’t care conditions. [5]

3. Logic GATES: AND, OR, NOT, NAND, NOR, Exclusive-OR and Exclusive-NOR. Implementations of

Logic Functions using gates, NAND-NOR implementations. Study of logic families like RTL, DTL, DCTL,

TTL, MOS, CMOS, ECL and their characteristics. [5]

encoder/decoder, parity checker, code converters. Implementation of combinational logic using MUX.

[6]

PART-B

5. Sequential Circuits: Flip flops SR, JK, T, D and Master slave, Excitation table, Edge triggering, Level

Triggering, Realization of one flip flop using other flip flops. Asynchronous/Ripple counters, Synchronous

counters, Modulo-n counter, Ring Counters. Classification of sequential circuits-Moore and Mealy, Design of

Synchronous counters: state diagram, Circuit implementation. Shift registers. [4]

6. Memory Devices: Classification of memories, RAM organization, Write operation, Read operation, Memory

cycle. Static RAM Cell-Bipolar, RAM cell, MOSFET RAM cell, Dynamic RAM cell. ROM organization,

PROM, EPROM, EEPROM, Field Programmable Gate Arrays (FPGA). [4]

7. Signal Conversions: Analog & Digital signals. A/D and D/A conversion techniques (Weighted type, R-2R

Ladder type, Counter Type, Dual Slope type, Successive Approximation type). [5]

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