P-N junction diode, current components, junction capacitance, junction diode, as a circuit element, special types of P-N junctions. P-N junction diodes, current components, junction capacitance, junction diode as a circuit element.
Bachelor in Electronics and Communications Engineering
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| content serial | Description |
|---|---|
| 1 | Revision. |
| 2 | Intrinsic and extrinsic semiconductors. Trivalent or pentavalent dopents,Conductance |
| 3 | Density of states. Electron and hole distribution in semiconductors using Fermi level distribution. Free carrier density in terms of mixed dopant density. |
| 4 | P-N junction under no bias. Distribution of electrons, holes, ionized donors , and ionized acceptors. Depletion region. Built-in-Voltage. |
| 5 | Capacitive effect of a P-N junction. Solutions of Possion?s equation in one dimension both for abrupt and graded junctions. Determination of the maximum electric filed. Width of the depletion layer. Determination of the junction capacitance for both types. |
| 6 | Continuity equation. Generation mechanism of carriers. Recombination mechanism and life time. Boundary conditions as a function of bias. Current density as a function of the junction voltage in a p-n junction. |
| 7 | 7th Week Exam. |
| 8 | P-N junction characteristics. Low and high injection currents. Series resistance. Shunt resistance. Saturation current. |
| 9 | P-N junction diode as a circuit element . Half wave and full wave rectifiers. Clipping circuits, Clamping circuits. Average output voltage. |
| 10 | Breakdown mechanisms. Zener diode and applications. |
| 11 | Varactors. The effect of doping profile on the characteristics. Application in tuning circuits. |
| 12 | Switching diodes, switching speed, metal-semiconductor junctions, Schotky diodes |
| 13 | Tunnel diode. The concept of tunneling. Conditions for tunneling. Qualitative evaluation of tunneling current. I-V characteristics of a tunnel diode. The concept of negative differential resistance. rn |
| 14 | Sources of light. Types of light: white, monochromatic and coherent. Light emitting diode (LED) properties, construction and operation. Semiconductor laser properties, construction, and operation: comparison and the use of each. |
| 15 | Photovolatic cells. Solar energy. Cell performance. Equivalent circuit. Parameters. |
| 16 | Final Examination |
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