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This blog post is a continuation of the project I worked on for my Analog Discovery 2 RoadTest Review. Check back soon for updates!   UPDATE 1 (7/16/19)   I've managed to get the analyzer partially functioning. I'm getting reasonable magnitude response estimates now, but the phase coming out of the FFT VIs is all zeros. That's wrong (the phase of the FFT of a first-order Butterworth filter should have a -90° shift starting from zero centered about the -3dB corner frequency of ...
While working on PCB bring-up for a project of mine recently, I ran across a rather sticky problem: I had neglected to add AC coupling capacitors between the outputs of a single-rail supply audio codec and the inputs of a split-rail supply output amplification stage. The particulars of the PCB made the prospect of adding AC coupling capacitors particularly unpalatable, so I elected to try a different approach. The output stage in question was a non-inverting op-amp based amplifier, diagrammed be ...
I'm currently working on bringing up a board for a piece of hardware I've been working on for a little over a year. You can read more about the history of the project on my project website if you're interested. This post is a work in progress; I hope to update it as I progress to a complete, fully functioning board.     This particular batch of PCBs is the second revision for this project, so hopefully I've managed to correct all the glaring errors from the first revision without maki ...