By Thomas L. Floyd
Digital units (Conventional present Version), 9th version, offers an excellent origin in simple analog electronics and a radical creation to analog built-in circuits and programmable devices.
The textual content identifies the circuits and elements inside of a process, aiding scholars see how the circuit pertains to the general process functionality. Full-color pictures and illustrations and easy-to-follow labored examples aid the texts powerful emphasis on real-world software and troubleshooting. up to date all through, the 9th variation positive factors new GreenTech purposes and a brand new bankruptcy, «Basic Programming options for computerized Testing.»
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3. 4. 5. 6. 7. 8. 9. 10. Define doping. What is the difference between a pentavalent atom and a trivalent atom? What are other names for the pentavalent and trivalent atoms? How is an n-type semiconductor formed? How is a p-type semiconductor formed? What is the majority carrier in an n-type semiconductor? What is the majority carrier in a p-type semiconductor? By what process are the majority carriers produced? By what process are the minority carriers produced? What is the difference between intrinsic and extrinsic semiconductors?
A grid-work of very thin conductive contact strips are deposited on top of the wafer by methods such as photoresist or silk-screen, as shown in part (b). The contact grid must maximize the surface area of the silicon wafer that be exposed to the sunlight in order to collect as much light energy as possible. Polished surface of n region pn junction and depletion region n region Conductive grid Reflective coating p region Conductive layer covers bottom (a) ᮡ (b) (c) FIGURE GA1–1 Basic construction of a PV solar cell.
The n-type layer is very thin compared to the p region to allow light penetration into the p region. The thickness of the entire cell is actually about the thickness of an eggshell. When a photon penetrates either the n region or the p-type region and strikes a silicon atom near the pn junction with sufficient energy to knock an electron out of the valence band, the electron becomes a free electron and leaves a hole in the valence band, creating an electron-hole pair. 12 eV (electron volts). In the p region, the free electron is swept across the depletion region by the electric field into the n region.
Electronic Devices Conventional Current Version by Thomas L. Floyd