Passive Filters – Part 3 – Modified Passive RC Filters

FIGURE 8: Type IV High-Pass Filter with ~95 Hz cut-off and approximately -10dB attenuation in the stopband.

Welcome to Part Three of this multi-part series on Passive Filters! In Part 1 we went over preliminary information to go about analyzing and designing passive filter circuits. That information isn’t required for basic filter design but it is required for designing and analyzing more complex filters, so it would be a good idea to run… Continue reading Passive Filters – Part 3 – Modified Passive RC Filters

Passive Filters – Part 2 – Low Pass & High Pass RC Filters

FIGURE 3: Verifying the -3dB frequency.

Welcome to Part Deux! In this article we’ll be covering the simple Low-Pass and High-Pass RC filters. While it’s encouraged to read Part 1, it’s not entirely necessary if you’re here for practical purposes. If the rabbit hole of filter design is calling you ever-so-strongly then you might want to consider reviewing Part 1. For… Continue reading Passive Filters – Part 2 – Low Pass & High Pass RC Filters

Passive Filters – Part 1 – Preliminary Stuff

Filters are used literally everywhere in electronics… They’re used for decoding communication lines, tuning your radios, and (most importantly) making sure your tone is absolutely killer! You can build basic filters very cheaply, with just a couple of components. In this multi-part series we’ll be looking at filters made up of capacitors and resistors, and… Continue reading Passive Filters – Part 1 – Preliminary Stuff