Analog — Active Filters & Signal Conditioning
Curated: learn to design active op-amp filters and condition an analog signal — filtering, amplifying and anti-aliasing it before an ADC — from a top free series, then prove it in Forge and get certified. Builds on Analog Fundamentals.
Analog Filters
ALL ABOUT ELECTRONICS · video · ~3h · Free · English
Why we picked it: ALL ABOUT ELECTRONICS is one of YouTube's most-followed dedicated electronics-engineering teachers (~792K subscribers, 470+ lessons) and is consistently top-rated for clear, math-grounded derivations. This is its focused Analog Filters series — seven intermediate lessons that take you from a plain RC filter to op-amp active filters and the Butterworth/Chebyshev responses a Sallen-Key stage implements. For the signal-conditioning half of the K-Check, pair it with two short companion series from the same channel: Op-Amp / Instrumentation Amplifier (https://www.youtube.com/playlist?list=PLwjK_iyK4LLDBB1E9MFbxGCEnmMMOAXOH) and ADC & DAC (https://www.youtube.com/playlist?list=PLwjK_iyK4LLCnW-df-_53d-6yYrGb9zZc).
- Passive RC low-pass and high-pass filters — the baseline before you add an op-amp
- Active low-pass and active high-pass filters built around an op-amp (gain + buffering)
- Band-pass and band-stop (notch) filters
- Filter approximations compared: Butterworth, Chebyshev, Elliptic, Bessel
- Designing a Butterworth low-pass / high-pass filter
- Designing a Chebyshev low-pass / high-pass filter
- Cutoff frequency, filter order and stop-band roll-off
- Reading a filter's frequency response (gain vs. frequency)
Study guide
Open the study guide →1 study section · what to focus on + prove it in Forge, then take the check.
Forge practical
Build it in Forge Design · 4 checks · auto-verified from your design
Start the practical →