Unit 66 Electrical, Electronic and Digital Principles


 

Unit 66:

Electrical, Electronic and Digital

 

 

Principles


Unit code:
T/601/1395

QCF level:
5


Credit value:
15






Aim

This unit aims to develop learners’ understanding of the electrical, electronic and digital principles needed for further study of electro-mechanical systems.

Unit abstract

This unit brings together the differing aspects of electrical, electronic and digital principles.

Learners will start by analysing series and parallel LCR circuits using complex notation and evaluating the effects on a circuit’s performance by changes in impedance.

Learners will then use different circuit theorems to evaluate currents and voltages in electrical circuits. They will also consider the conditions for maximum power transfer and impedance watching.

The differing types and classes of operation of electronic amplifiers are analysed and evaluated before some are designed and tested then compared with theoretical results.

Finally, learners will investigate digital electronic device families and the design and testing of digital circuits.

Learning outcomes

On successful completion of this unit a learner will:

1     Be able to apply complex notation in the analysis of single phase circuits

2       Be able to apply circuit theory to the solution of circuit problems

3       Understand the operation of electronic amplifier circuits used in electro-mechanical systems

4       Be able to design and test digital electronic circuits used in electro-mechanical systems.


Unit content
1      Be able to apply complex notation in the analysis of single phase circuits

Series and parallel LCR circuits: voltage, current and power with sine wave signals; conditions for resonance eg frequency response, impedance, Q factor; complex notation

Circuit performance: tolerancing; effect of changes in component values


2      Be able to apply circuit theory to the solution of circuit problems

Circuit theorems: Norton; Kirchhoff; Thevenin; superposition; maximum power Circuit analysis: mesh; nodal; maximum power transfer; impedance matching

3      Understand the operation of electronic amplifier circuits used in electro-mechanical systems

Single- and two-stage transistor amplifiers: class of operation eg A, B, AB and C; analysis of bias; DC conditions; AC conditions; coupling; input impedance; output impedance; frequency response

Design, test and evaluate: a single-stage amplifier to a given specification; compare measured and theoretical results

4      Be able to design and test digital electronic circuits used in electro-mechanical systems

Digital electronic devices: logic families eg TTL, LS-TTL and CMOS; comparison between families; circuits integration; identification of digital circuits in electro-mechanical systems

Combinational circuits: simplification methods; truth tables; single gate solutions; circuit simulation; testing

Design and test: circuit designed should be bread-boarded or simulated using an appropriate computer software package




Learning outcomes and assessment criteria


Learning outcomes
Assessment criteria for pass


On successful completion of
The learner can:


this unit a learner will:










LO1 Be able to apply complex

1.1
solve problems involving LCR circuits


notation in the analysis of

1.2
evaluate the effects on circuit performance of


single phase circuits





changes in values of impedances













LO2 Be able to apply circuit theory

2.1
solve problems using circuit theorems to calculate


to the solution of circuit


currents and voltage in circuits


problems

2.2
analyse circuits including the value of circuit loads









which produce maximum power







LO3 Understand the operation of

3.1
analyse the operation of single- and two-stage


electronic amplifier circuits


amplifiers


used in electro-mechanical

3.2
evaluate the performance of single- and two-stage


systems





amplifiers









3.3
design and evaluate a single-stage transistor





amplifier




3.4
compare measured results with theoretical





calculations







LO4 Be able to design and test

4.1
evaluate digital electronic device families


digital electronic circuits used

4.2
design combinational and sequential digital


in electro-mechanical





electronic circuits


systems











4.3
test digital circuits by construction or by computer





simulation.









Guidance

Links

This unit can be linked with Unit 58: Microprocessor Systems.


Essential requirements

Centres will need to provide access to appropriate laboratory test equipment, such as signal generators, oscilloscopes, power supplies and test meters, together with prototype boards and digital circuit trainers.

Appropriate software packages (for example circuit simulators such as PSpice, Tina Pro, or Electronics Workbench) will also need to be used to enable modelling and rapid prototyping, and to provide confirmation of experimental results.

Employer engagement and vocational contexts

Delivery would benefit from visits to local engineering companies that use a wide range of electro-mechanical systems. Delivery will also be helped by visits from guest speakers with relevant industrial experience.



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