("Golden Gnat" Rate Gyro \253 Edge Triggered)

5/26/2011 "Golden Gnat" Rate Gyro « Edge Trigger…
rectification, there will be some dead-zone around the waveform zero crossings, so the pickoff oscillator need
not have perfect zero-crossing characteristics – something I hadn’t thought of at the time. The rest of the circuit is
just offset nulling, some gain and some filtering.
Results
The output bandwidth of the demodulator is limited to about 3 Hz, so the time scale of the following graph
covers 10 seconds to show the relevant information. Here I’ve tried to rotate the gyro by hand at a constant rate
back and forth 180 degrees while pausing in between turns:
From the rate output, it looks as though I’ve consumed too much coffee, but after integrating the output to give
angular position, you can see that I didn’t do too badly after all. If this isn’t convincing enough, perhaps the
following video will give a better idea of the response:
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