Gambar pertama ialah full-wave bridge rectifier untuk positive half-cycle.
Gambar kedua ialah full-wave bridge rectifier untuk negative half-cycle.
Monday, November 22, 2010
Kegunaan utama diode
Gambar pertama ialah full-wave bridge rectifier untuk positive half-cycle.
Gambar kedua ialah full-wave bridge rectifier untuk negative half-cycle.
Tuesday, November 9, 2010
Kertas Tugasan 1 Pengenalan kepada Diod
Soalan-soalan untuk topik Pengenalan kepada Diod. Hantar kertas tugasan yang telah diselesaikan pada awal minggu kedua.
1. In any electrically conductive substance, what are charge carriers? Identify the charge carriers in metallic substances, semiconducting substances, and conductive liquids.
2.Engineers and scientists often use energy band diagrams to graphically illustrate the energy levels of electrons in different substances. Electrons are shown as solid dots:
Based on these diagrams, answer the following questions:
3. Describe the difference between an intrinsic and an extrinsic semiconducting substance.
4. What effect does doping concentration have on the electrical conductivity of an extrinsic semiconductor?
5. What must be done to an intrinsic semiconductor to turn it into an "N-type" semiconductor?
6. What must be done to an intrinsic semiconductor to turn it into a "P-type" semiconductor?
7. When "P" and "N" type semiconductor pieces are brought into close contact, free electrons from the "N" piece will rush over to fill holes in the "P" piece, creating a zone on both sides of the contact region devoid of charge carriers. What is this zone called, and what are its electrical characteristics?
8. What happens to the thickness of the depletion region in a PN junction when an external voltage is applied to it?
9.
Insert a diode into this circuit schematic in the correct direction to make it forward-biased by the battery voltage:
10. If a semiconductor PN junction is reverse-biased, ideally no continuous current will go through it. However, in real life there will be a small amount of reverse-bias current that goes through the junction. How is this possible? What allows this reverse current to flow?
1. In any electrically conductive substance, what are charge carriers? Identify the charge carriers in metallic substances, semiconducting substances, and conductive liquids.
2.Engineers and scientists often use energy band diagrams to graphically illustrate the energy levels of electrons in different substances. Electrons are shown as solid dots:
| |
Based on these diagrams, answer the following questions:
- •
- Which type of material is the best conductor of electricity, and why?
- •
- Which type of material is the worst conductor of electricity, and why?
3. Describe the difference between an intrinsic and an extrinsic semiconducting substance.
4. What effect does doping concentration have on the electrical conductivity of an extrinsic semiconductor?
5. What must be done to an intrinsic semiconductor to turn it into an "N-type" semiconductor?
6. What must be done to an intrinsic semiconductor to turn it into a "P-type" semiconductor?
7. When "P" and "N" type semiconductor pieces are brought into close contact, free electrons from the "N" piece will rush over to fill holes in the "P" piece, creating a zone on both sides of the contact region devoid of charge carriers. What is this zone called, and what are its electrical characteristics?
8. What happens to the thickness of the depletion region in a PN junction when an external voltage is applied to it?
9.
Insert a diode into this circuit schematic in the correct direction to make it forward-biased by the battery voltage:
10. If a semiconductor PN junction is reverse-biased, ideally no continuous current will go through it. However, in real life there will be a small amount of reverse-bias current that goes through the junction. How is this possible? What allows this reverse current to flow?
Minggu Pertama
No. & Tajuk Pengalaman Pembelajaran: LE1 Uji Komponen Aktif
No. & Tajuk Tugasan: Task07.02 - Test of Active Component
Code No.:B05-01-04-LE1-IS1b
Untuk minggu pertama, kita akan belajar mengenai Pengenalan kepada Diod.
Tujuan pembelajaran adalah untuk menerangkan tentang
Kertas penerangan akan diedarkan di dalam kelas dan juga boleh di download dari tab Kertas Penerangan di dalam blog ini.
Terdapat juga nota-nota sampingan dan buku-buku rujukan yang disarankan untuk bacaan lanjutan. Semua nota untuk di download adalah password-protected. Password untuk download ialah 'belajar'.
No. & Tajuk Tugasan: Task07.02 - Test of Active Component
Code No.:B05-01-04-LE1-IS1b
Untuk minggu pertama, kita akan belajar mengenai Pengenalan kepada Diod.
Tujuan pembelajaran adalah untuk menerangkan tentang
- diod sebagai peranti separuh pengalir
- pengenalan kepada beberapa jenis diod
Kertas penerangan akan diedarkan di dalam kelas dan juga boleh di download dari tab Kertas Penerangan di dalam blog ini.
Terdapat juga nota-nota sampingan dan buku-buku rujukan yang disarankan untuk bacaan lanjutan. Semua nota untuk di download adalah password-protected. Password untuk download ialah 'belajar'.
Monday, November 8, 2010
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