Electronic Components… · SHS3 Applied Technology

Lesson notes

Learning Objectives

Indicator: 3.5.2.LI.12 - Describe AM and FM receivers in electronic communication

By the end of the lesson, learners can:

Define amplitude modulation (AM) and frequency modulation (FM) and state the key difference between them.
Identify and label the stages in the block diagrams of both AM and FM receivers.
Describe the function of each major block (RF amplifier, mixer/convertor, local oscillator, IF amplifier, demodulator/detector, audio amplifier, loudspeaker) in a receiver.
Explain at least three differences between AM and FM receivers in terms of circuitry, signal quality, and bandwidth.
Compare the strengths and weaknesses of AM and FM receivers and recommend an appropriate receiver for a given communication scenario.

Sign in with your phone number to read the full note and download the GES plan - free.

Sign in with phone number

Curriculum details

Strand: Electrical and Electronic Technology (Strand 5)
Sub-strand: Electronic Components and Circuits (5.2)
Content standard: 3.5.2.CS.1 - 3.5.2.CS.1 Demonstrate knowledge and understanding of electronic components and use them to design and construct electronic circuits. 3.5.2.LO.1 Demonstrate knowledge and understanding of electronic components and use them to design and construct electronic circuits.
Indicator: 3.5.2.LI.12 - Describe AM and FM receivers in electronic communication
Suggested placement: Semester 2, Week 20 (Week 40 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

content standard text - p.196: prints the content-standard code as "2.5.2.CS.1"; filed under the section's own 3.5.2.CS.1
content standard text - p.196: prints the learning-outcome code as "2.4.2.LO.1"; filed under the section's own 3.5.2.LO.1
content standard text - p.196: the front page prints "Strand 4." for Electrical and Electronic Technology inside the YEAR THREE section, where Year 3's strand 4 is Wood Technology (printed pp.164 and 170); the Contents page (printed p.6) prints "STRAND 5. ELECTRICAL AND ELECTRONIC TECHNOLOGY" for Year 3 and Year 2 numbers the same strand 5, so the row is filed under strand 5
indicator text - p.196: prints the learning-indicator code as "2.5.2.LI.12"; filed under the section's own 3.5.2.LI.12
exemplars - p.196: prints the assessment code as "2.5.2.AS.12"; filed under the section's own 3.5.2.AS.12
Curriculum reference: NaCCA curriculum document, p. 196

Exemplars (from the NaCCA curriculum)

Focal Areas:
- AM Receiver
- FM Receiver Pedagogy
Collaborative Learning: With the use of the internet, engage learners in mixed-ability groups to explain the following:
- AM Receiver
- FM Receiver
Research and Collaboration: Organise the learners into mixed-ability and gender groups and task them to research on the Google search engine and the U-Tube to undertake the following activities and do a group presentation on their findings: Draw the block diagram of
- AM Receiver
- FM Receiver Explain the differences between the AM and FM Receivers.

Assessment (3.5.2.AS.12). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.

Teaching and Learning Materials:
- Computers installed with multism software
- Electronic Components
- multimeters
- the use of the internet