Bsc III Semester

EL-2102

DIGITAL ELECTRONICS -II

Unit I: TTL Circuits

TTL Circuits,  Digital Integrated Circuits:  7400  Series, TTL  Characteristics,  TTL Overview, Open
Collector  & Totem  Pole Outputs,  Difference between TTL types including  Schottky, Low power
Schottky, Standard and Low Power TTLs. Introduction to MOS Logic Family, Comparison between TTL
and MOS Families.

Unit II: Latches & Flip Flops

RS  and  D-Latches,  RS Flip-Flop, Edge triggered D,  JK and T  Flip-Flop.  Concept of  Racing  and JK
Master Slave Flip Flops.

Unit III: Registers

Buffer Registers, Shift Registers, Controlled Shift Registers.

Unit IV: Counters

Ripple Counters, Synchronous Counters, Ring Counters, Synchronous and Asynchronous loading of the
Counters, Clear and Preset in the counters.

Unit V: Converters

Basic D/A Converters: R-2R, Binary Weighted Resistor type, A/D Converters: Counter, Ramp, Flash
and Successive Approximation. Sample and Hold Circuits: Basic Concept and Working.

BOOKS RECOMMENDED:
1.  Digital Principles and Applications   : Malvino and Leach
2.  Modern Digital Electronics           : R.P. Jain
3.  Digital Computer Electronics     : Malvino and Brown

Note: The question paper will have the usual Note saying “Attempt five questions choosing one from
each unit”. Thus the paper will clearly specify units and have a pattern of two questions per unit with an
option to attempt any one of these two within each unit. The balance of paper will be maintained by
including appropriate (Numerical / Objective / Conceptual / Analytical / Theoretical) combination of
subsections in each question.