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Introduction to Radio Circuit Blocks#



Like all circuitry or other complex system, a block diagram is useful to see an overview of how the whole thing works.

Block diagram#

Additionally, block diagrams show overall 'black box' functionality, such that the box describes its function and shows inputs and outputs. This allows for a modular approach in design, development and subsequent modifications and improvements to be made.

Replicable, exchangeable, upgradable#

This means that a module could be replaced with another solution that performs the same function.

Block diagrams#

An example of a block diagram

M0OOZ - YooFab / CC BY NC ND

Some important radio blocks#

Here is Mega-Boffin, Author & Radio Guru Peter Parker (VK3YE) from down under explaining how Radio Circuit Blocks work

This is what VK3YE says about his video

Radio schematic and block diagrams can be daunting to many. One way to understand is to break it up into stages or modules. Many stages perform similar things, and knowledge of only a few main families is necessary to understand how a basic transceiver works. This video takes you through these basic building blocks, discussing oscillators, amplifiers, mixers and filters. I describe where they're used and show examples of modules. If you're memorising this for an exam, think FOAM (Filters, Oscillators, Amplifiers, Mixers). Afterwards watch Part 2, which arranges the blocks to form various types of receivers, transmitters and transceivers.

Part One

Part two

This video (Part 2 of 2) arranges these basic building blocks to form various receivers, transmitters and transceivers. It starts with a basic direct conversion receiver, adds improvements and then describes a superheterodyne receiver. Transmitters are dealt with next, from CW to FM via DSB and SSB. Finally, a simple transceiver is illustrated. Part 1, which described what the individual blocks perform, should be watched before this Part 2