01b - Electrical Conduction

01b - Electrical Conduction - EECS 320 Electrical...

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EECS 320 Electrical Conduction Electronic Devices We have just learned about electronic devices How do they work? How do they control electrical current/voltage? Anode Cathode +- V I Gate Drain J. Phillips EECS 320 Let’s start with examining electrical current flow in a solid material Source
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Response of Electron to Electric Field What happens to an electron when we apply a voltage/electric field? dt dv m qF 0 Force = = m 0 =electron rest mass q=charge on an electron (1.6x10 -19 C) F=electric field v=velocity (“-” sign for electron) F J. Phillips EECS 320 What is the velocity of the electron in vacuum? What is the velocity of the electron in a solid? Scattering Events Determine Electron Velocity Carriers are accelerated by electric field J. Phillips EECS 320 Carriers scatter from imperfections in material Average electron velocity for a given electric field We need to determine the velocity-electric field relation for a given material!
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Ohm’s Law Voltage across resistor is proportional to current
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01b - Electrical Conduction - EECS 320 Electrical...

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