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2. 2 3. lecture

3. 3 WHY? Introduce the device physics it is so complicated..

4. 4 The SPICE diode model.

5. 5 Simplified physical structure of the junction diode.

6. 6 At 0 K, all bonds are intact and no free electrons are available for current conduction.

7. 7 At room temperature, some of the covalent bonds are broken by thermal ionization. Each broken bond gives rise to a free electron and a hole, both of which become available for current conduction.

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9. 9 A silicon crystal doped by a pentavalent element. Each dopant atom donates a free electron and is thus called a donor. The doped semiconductor becomes n type.

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11. 11 The SPICE diode model.

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28. 28 Opgave: Bestem r DS, r o, V t og for MOS-FET transistoren: IRF510