Uploaded June 2024 | Updated September 2026, 1 week ago

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#225 In this episode I start looking at piezo-electric based components that can be used in filter circuits. Things like ceramic resonators, quartz crystals and SAW or BAW filter components can all be categorized into a wider class of piezo-electric components. I first look at what are the principles used by such a component and then continue by looking at the equivalent electrical model. Finally I run some basic measurements and also look at how a filter can be built around a crystal type component.

Filter series:
Ep1 – Intro : youtu.be/Zipbm27LoZ4
Ep2 - Passive RC Filters: youtu.be/NBLCqqmvy0A
Ep3 - Active RC Filters: youtu.be/FQYtOj_4kbw
Ep4 – More Active RC Filters: youtu.be/H_DiGSNaFyg
Ep5 - Introduction to LC Filters: youtu.be/KECCpj1Qpn0
Ep6 - LC filter limitations: youtu.be/DYJkmq5xUlc
Ep7 - Piezo-Electric Filters: youtu.be/KJK27K3ibw8
Ep8 – Crystal Filter Measurements and Design: youtu.be/J4wgCfLWI00
Ep9 - Cavity filter Basics: youtu.be/ALjjW4NgBzg
Ep10 - Cavity filter Experiments: youtu.be/F6vqAw1Cn8E
Ep11 - Stub filters: youtu.be/tQnCpV4L_6s

Measuring and simulating crystals: youtu.be/MWQCZGXpSSc

Further reading:
Handbook of Filter Synthesis; A.I. Zverev, 1967

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