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@davidbody@fosstodon.org
2025-04-28 14:42:13

I did some experiments measuring propagation delay in a simple chain of 3 digital inverters (NOT gates) (74LS04).
I'm honestly not sure my entry-level scope is fast enough to accurately measure this, but it's fun to try.
It's also interesting to watch the signals completely freak out when you change the input voltage too slowly, but I didn't make a screenshot of that.
#electronics

Electronics lab bench with oscilloscope, signal generator, and power supply with leads connected to a small breadboard circuit.
Oscilloscope screenshot with four traces. Rising input voltage (yellow) and outputs of successive inverters (cyan, magenta, blue). Cursors measure the total propagation delay to be about 30ns.