JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• To explain the complete response of R-C and R-L-C transient circuits.
• To explain clippers, clampers, switching characteristics of transistors and sampling gates.
• To construct various multivibrators using transistors, design of sweep circuits and sampling gates.
• To discuss and realize logic gates using diodes and transistors.

Course Outcomes

At the end of the course, the student will be able to:

• Understand the applications of diode as integrator, differentiator, clippers, clampler circuits.
• Learn various switching devices such as diode, transistor, SCR. Difference between logic gates and sampling gates
• Design multivibrators for various applications, synchronization techniques and sweep circuits.
• Realizing logic gates using diodes and transistors.
• Understanding of time and frequency domain aspects.
• Importance of clock pulse and its generating techniques.

UNIT - I

Linear Wave Shaping: High pass and low pass RC circuits and their response for Sinusoidal, Step, Pulse, Square, & Ramp inputs, High pass RC network as Differentiator, Low pass RC circuit as an Integrator, Attenuators and its application as a CRO Probe, RL and RLC Circuits and their response for Step Input, Ringing Circuit.

UNIT - II

Non-Linear Wave Shaping: Diode clippers, Transistor clippers, Clipping at two independent levels, Comparators, Applications of Voltage comparators. Clamping Operation, Clamping circuit taking Source and Diode resistances into account, Clamping Circuit Theorem, Practical Clamping Circuits, Effect of Diode Characteristics on Clamping Voltage, Synchronized Clamping.

UNIT - III

Switching Characteristics of Devices: Diode as a Switch, Piecewise Linear Diode Characteristics, Diode Switching times, Transistor as a Switch, Break down voltages, Transistor in Saturation, Temperature variation of Saturation Parameters, Transistor- switching times, Silicon-controlled-switch circuits.

UNIT - IV

Multivibrators: Analysis and Design of Bistable, Monostable, Astable Multivibrators and Schmitt trigger using Transistors. Time Base Generators: General features of a Time base Signal, Methods of Generating Time Base Waveform, Transistor Miller Time Base generator, Transistor Bootstrap Time Base Generator, Transistor Current Time Base Generators, Methods of Linearity improvement.

UNIT - V

Sampling Gates: Basic operating principles of Sampling Gates, Unidirectional and Bi- directional Sampling Gates, Four Diode Sampling Gate, Reduction of pedestal in Gate Circuits Realization of Logic Gates Using Diodes & Transistors: AND, OR and NOT Gates using Diodes and Transistors, DCTL, RTL, DTL, TTL and CML Logic Families and its Comparison.

TEXT BOOKS:

• 1. Millman’s Pulse, Digital and Switching Waveforms –J. Millman, H. Taub and Mothiki S. Prakash Rao, 2 Ed., 2008, McGraw Hill.
• 2. Pulse, Switching and Digital Circuits - David A. Bell, 5th edition 2015, OXFORD University Press

REFERENCE BOOKS:

• 1. Pulse and Digital Circuits -Venkata Rao K, Rama Sudha K, Manmadha rao G, Pearson, 2010
• 2. Pulse and Digital Circuits – A. Anand Kumar, 2005, PHI.