ECE 223 LINEAR ACTIVE / INTEGRATED CIRCUITS 3L 0T 1P 4C 4CH
Course Objective
To provide exposure and knowledge to the students enabling them to develop insights into working of active devises and
their design.
Module 1:
Biasing of Darlington pair and current mirror.
Differential amplifier: Dual input balanced output and unbalanced output, Common mode.
Module 2:
Operational amplifier (Opamp): Introduction, Internal block schematic of Opamp, Integrated Circuits (IC), Opamp
parameters, Ideal Opamp equivalent circuits, transfer characteristics. Open loop Opamp configurations, open loop gain,
input and output impedance. Opamp with negative feedback and its corresponding parameters. Differential amplifier
with one, two and three opamp. Practical opamp, offset current, offset voltage, Common mode configuration and CMRR,
SVRR, Slew rate & its effect, typical datasheet 741.
Opamp applications: Inverting, non-inverting and differential amplifiers, averaging and scaling amplifier, Adder,
Subtractor, Instrumentation amplifier. Voltage to current, current to voltage converters, Peaking amplifier. Nonlinear
circuits- integrator, differentiator, gyrator. Comparator- Zero crossing detector, Schmitt trigger, Voltage limiters. Clippers,
Clampers, Rectifiers, Precision rectifier, Peak detector, Sample and Hold circuit. Voltage regulators (block diagram and
typical low voltage regulator circuit), 78XX, 79XX, 317.
Module 3:
Active filters: Order of filters, Low pass, high pass, band pass, band reject, narrow band pass, notch, all pass.
Oscillators: Oscillator principles, Barkhausen’s criterion; Types- LC oscillator, Hartley, Collpitts & Clapp oscillators, RC
phase shift, Wien bridge and Crystal oscillators. Square wave generator, Triangular wave generator, Saw tooth wave
generator Voltage control oscillator
Module 4:
Specialized ICs: 555 Timer architecture and applications (Monostable and Astable multivibrator) linear time base
generator, VCO architecture and applications, PLL-architecture and applications.
A/D and D/A Converter: DAC (Weighted-R, R-2R Networks), ADCs (Dual slope, counter type, successive approximation
and flash type).
PRACTICALS:
The practical consists of circuit analysis based on various topics related to the subjects. Few of the examples are given
below.
List of experiments:
1.0 Differential amplifier.
2.0 Clippers using Opamp
3.0 Opamp amplifier
4.0 Adder & Subtractor using Opamp
5.1 Zero crossing detector & Comparator using Opamp
5.2 Schmitt Trigger using Opamp
5.3 Voltage Limiter using Opamp
6.0 Integrator & Differentiator using Opamp
7.0 Precision Rectifier using Opamp
8.0 Square & Triangular wave generator
9.1 Low Pass filter using opamp
9.2 High Pass filter using opamp
9.3 Band Pass filter & Band reject filter using opamp
10.1 Wien Bridge Oscillator using Opamp
10.2 RC Phase Shift Oscillator using Opamp
11.1 555 TIMERS as monostable multivibrator
11.2 555 TIMERS as astable multivibrator
11.3 VCO using 555 timer
12.0 D-A converter (R-2R ladder network)
13.0 Instrumentation Amplifier using Opamp
14.0 ASSIGNMENT 1: To design a regulated DUAL power supply.
15.0 ASSIGNMENT 2: PSPICE simulation of all experiments.
16.0 MINI PROJECT (optional)
Suggested Reading:
1. Electronic devices & circuit theory- Boylestad & Nashalsky, Pearson.
2. Integrated Electronics - Millman-Halkias, Tata McGraw Hill.
3. Op-amps and Linear Integrated Circuits – Ramakant A. Gayakwad, PHI
4. An integrated course in Electronics Engineering. – J.B.Gupta, S.K. Kataria and Sons
