Mod4

MODULE 4: ELECTRONICS FUNDAMENTAL FOR B1 EXAMINATIONS  - RESOURCES

	Sub-modules	Resources
	Syllabus/     Questions	Syllabus  / Question Google /
Topics	4.1 Semiconductors 4.1.1 Diodes (a) Diode symbols; (Levels -, 2, 2) Diode 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.
	(b) Materials, electron configuration, electrical properties; (Levels -, -, 2) 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 & 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, Shottky diode, photo conductive diode, varactor diode, varistor, rectifier diodes, Zener diode.	Thyristor
	4. 1.2 Transistors (a) Transistor symbols;  -  , 1, 2 Component description and orientation; Transistor characteristics and properties. (b) Construction and operation of PNP and NPN transistors;  - , -, 2 Base, collector and emitter configurations; 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 & stabilisation; Multistage circuit principles: cascades, push-pull, oscillators, multivibrators, flip-flop circuits.
	4.1.3 Integrated Circuits  (Levels -, 1, - ) (a) Description and operation of logic circuits and linear circuits/operational amplifiers. (b) Description and operation of logic circuits and linear circuits;  (Levels -, - , 2 ) 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.	Micro-processor History - from C4004
	4.2 Printed Circuit Boards   (B1- L1 and B2-L2) Description and use of printed circuit boards.
	4.3 Servomechanisms (a) Understanding of the terms: (B1-L1)Open and closed loop systems, feedback, follow up, analogue transducers; Principles of operation and use of the following synchro system components/features: resolvers, differential, control and torque, transformers, inductance and capacitance transmitters (b) Understanding of the following terms:  (B2 -  L2) Open & closed loop, follow up, servomechanism, 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.
	Switches/ Sensors	- Hall Effect Sensors