Analog Filter Debugger Tool

I’ve been working on a design lately that will allow a circuit designer to probe a circuit and filter the point probed with whatever filter the designer wants to try out.  The idea is that it can be used like a decade resistance box, but with low pass, high pass, band pass and notch filters that can be tuned to a large range of frequencies and bandwidths.

I’m going to try to conquer this project by creating modules that can be used and reused as building blocks in this project and many projects to come!

Here’s my first attempt at one of the major modules:

I’m know is not the best tool, but I love the ability for collaboration. There are a lot of changes that need to be made to this, including bypass power caps on the op amp and moving the pin configuration to work more easily in a backplane-type design.

Hopefully I will have some design drawings and system diagrams soon to post!


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