Post #2299506
2024-05-02 23:35 UTC
@spinach@girlcock.club @astrid@fedi.astrid.tech @lily@glaceon.social it's also extremely useful for knowing when you need to switch from a lumped circuit model to a transmission line model. essentially figuring out whether the signal voltage will be near constant across the length of the trace (lumped, modelling a simplistic conductor) or if there will be considerable variation in the voltage across the length of the trace (transmission line, modelling a waveguide).
and for digital it's the rise/fall time that matters, not the fundamental.
Replies (1)
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@gsuberland@chaos.social 2024-05-02 23:40
@spinach@girlcock.club @astrid@fedi.astrid.tech @lily@glaceon.social also fun fact: characteristic impedance and transmission line effects in circuits are the exact same physical phenomena as refractive indices and refraction/reflection of light. literally the same thing, just different frequencies! I am glad I happened to be learning signal integrity and laser physics at the same time because noticing that the two sets of equations were identical by pure coincidence was extremely satisfying. super cool eureka moment.