7 ms·
The speed of electrical waves in a chip is ~c/2. The relative permittivity εr of SiO2 is ~4. c = c0 / sqrt(εr) c0 = 1 /sqrt(ε0εr × μ0μr) and in vacuum εr=μr=
by silizium 2y ago
The speed of electrical waves in a chip is ~c/2.
The relative permittivity εr of SiO2 is ~4.
c = c0 / sqrt(εr)
c0 = 1 /sqrt(ε0εr × μ0μr) and in vacuum εr=μr=1.
But the frequency needs to be sufficiently high in order to observe wave propagation, let's say >10GHz.
For low frequencies the electric conductor behaves more like a RC chain.
- eqvinox 2y agoConsidering the PCIe context, I was assuming we were talking about off-chip connections, i.e. diff microstrips/striplines in FR4 and air. εr is 2.6-ish there. But you're right, I might have accidentally mixed in some radio connection bits, with the HFT company anecdote.