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MODULE-04 Electronic Fundamentals

•  ATTEMPT THE QUESTION SET AGAINST EACH SUB-MODULE FOR REALTIME ASSESMENT AND FEEDBACK WITH SCORING

4.1 - Semiconductors
4.1.1 - Diodes
(a)Diode symbols; 1Diode characteristics and properties;Diodes in series and parallel;Main characteristics and use of silicon controlled rectifiers (thyristors),light emitting diode, photo conductive diode, varistor, rectifier diodes;Functional testing of diodes.

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(b)Materials, electron configuration, electrical properties; 1
P and N type materials: effects of impurities on conduction, majority
and minority characters;
PN junction in a semiconductor, development of a potential across a PN junction in
unbiased, forward biased and reverse biased conditions;
Diode parameters: peak inverse voltage, maximum forward current,
temperature, frequency, leakage current, power dissipation;
Operation and function of diodes in the following circuits: clippers,
clampers, full and half wave rectifiers, bridge rectifiers, voltage doublers and triplers;
Detailed operation and characteristics of the following devices: silicon
controlled rectifier (thyristor), light emitting diode, Schottky diode, photo
conductive diode, varactor diode, varistor, rectifier diodes, Zener diode.
4.1.2 - Transistors
(a)

(b)
Transistor symbols; 1
Component description and orientation;
Transistor characteristics and properties.
Construction and operation of PNP and NPN transistors; 1
Base, collector and emitter configurations;
——= AIRCRAFT Module 04 - Electronic Fundamentals SSS FECH NICAL Book Company

LEVELS
CERTIFICATION CATEGORY> B2

Testing of transistors;
Basic appreciation of other transistor types and their uses;
Application of transistors: classes of amplifier (A, B, C);
Simple circuits including: bias, decoupling, feedback and stabilisation;
Multistage circuit principles: cascades, push-pull, oscillators,
multivibrators, flip-flop circuits.
4.1.3 - Integrated Circuits
(a) Description and operation of logic circuits and linear circuits/operational amplifiers; 1
(b) Description and operation of logic circuits and linear circuits; 1
Introduction to operation and function of an operational amplifier used as:
integrator, differentiator, voltage follower, comparator;
Operation and amplifier stages connecting methods: resistive capacitive,
inductive (transformer), inductive resistive (IR), direct;
Advantages and disadvantages of positive and negative feedback.
4.2 - Printed Circuit Boards
Description and use of printed circuit boards. 1
4.3 - Servomechanisms
(a) Understanding of the following terms: Open and closed loop systems, 1
feedback, follow up, analogue transducers;
Principles of operation and use of the following synchro system
components/features: resolvers, differential, control and torque, ransformers,
inductance and capacitance transmitters.
(b) Understanding of the following terms: Open and closed loop, follow up, servomechanism, 1
analogue, transducer, null, damping, feedback, deadband;
Construction operation and use of the following synchro system components: resolvers,
differential, control and torque, E and I transformers, inductance transmitters, capacitance
transmitters, synchronous transmitters;
Servomechanism defects, reversal of synchro leads, hunting.