ECE%20207%20-%2023%20Nov%2010%20-%2020101123_153402

ECE%20207%20-%2023%20Nov%2010%20-%2020101123_153402 - ECE...

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Schedule: Diodes Allows current only to flow in one direction A two terminal semiconductor device: nonlinear i-v behavior Applications: If you start with an AC waveform and to power some device, you probably need DC current, diodes make this conversion possible AC to DC converter Wave-shaping circuits: Regulator: Shunting current with inductive loads. Analogous to water pouring into the washing machine and the valve closes and the pipe shutters, similarly we have a large di/dt, so a large voltage spike (V = L * di/dt) Page 1 of 6 - Nov 23, 2010 ECE 207 - 23 Nov 10
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Conductors (allow current to flow: silver, copper, etc, wires), insulators (stop current from flowing, rubber, glass, teflon) want to 'dope' something to provide better conduction Doped silicon: provides better conduction in Silicon Donor impurity: Type 5 elements donate extra electrons to the silicon lattice Note: there is also an extra proton in P to allow this system to be electrically neutral Page 2 of 6 - Nov 23, 2010 ECE 207 - 23 Nov 10
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Doping with Type 3 elements
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