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This comment makes no sense. Neither electrons nor photons are what move through wires to propagate electrical signals.
by aisofteng 10y ago
This comment makes no sense. Neither electrons nor photons are what move through wires to propagate electrical signals.
- gaze 10y agoI'd definitely say electrons propagate through wires to carry signals. The electrons charge the gates on the fets which opens or closes the channel, which allows electrons to flow through another wire. I wouldn't say it's terribly explanatory tho
- kushan2020 10y agoWell that is not correct @gaze. Although your light turns on very quickly when you flip the switch, and you find it impossible to flip off the light and get in bed before the room goes dark, the actual drift velocity of electrons through copper wires is very slow. It is the change or "signal" which propagates along wires at essentially the speed of light. refer https://en.m.wikipedia.org/wiki/Drift_velocity https://en.m.wikipedia.org/wiki/Drift_velocity
- xanton 10y agoAll the theory behind microelectronics is all about about electrons, "holes" and how fast and where they move.
- hexane360 10y agoHowever, you need a certain amount of electrons/charge to flow to flip a gate, because semiconductors work by filling and emptying voids in crystals. So gate speed is proportional to current, which is proportional to voltage, which is proportional to the square root of power.