Anglicky v odborných předmětech "Support of teaching technical subjects in English“

1. Anglicky v odborných předmětech"Support of teaching technical subjects in English“ Tutorial: Mechanic - electrician Topic: Technicaltraining II. class Semiconductordevices2 Prepared by: Melichařík Lubomír Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

2. SEMICONDUCTOR DEVICES 2 • P-N transition • Is the area of the ingredient interface of P-type semiconductors and N-type semiconductors. P-Njunction transmits an electric current in only one direction. • Properties of P-N junctions used in semiconductor components – diode, transistor, photodiodeand others.

3. SEMICONDUCTOR DEVICES 2 • Diode • is an electronic semiconductor device with two electrodes. Each diode has two working outlets, which are called the cathode and the anode. The basic function of diodes is to permit current flow in the direction from the anode to the cathode from very low voltages.

4. SEMICONDUCTOR DEVICES 2 • Diodes-electrotechnical symbols • Electrotechnical schematic symbol for diodes • Electrotechnical schematic symbol for zener diodes • Electrotechnical schematic symbol for capacitance diodes - varicap • Electrotechnical schematic symbol for LED diodes • Electrotechnical schematic symbol for photodiodes

5. SEMICONDUCTOR DEVICES 2 • DIVISION OF DIODES • According to design principle and purpose: Cylindrical diode – historically the oldest type of semiconductor diode, basic crystals Junction diode Schottky diode – It does not use a P-N junction, but a metal-semiconductor junction Switch diode – 0.1 to 0.2V Rectifier diode- 0.5 V

6. SEMICONDUCTOR DEVICES 2 • TYPES OF DIODE • Photodiode– incoming light causes the creation of a pair of electrons in the region of the P-N junction – positive hole, and thus increases the conductivity or increases the voltage at the P-N junction. • LED – luminous diode. Recombination in the region of the P-N junction when the current flows in the forward direction to cause the emission of light rays. • Zenerdiode– is usually designed sothat the reverse directionoccurs at a voltage of a few voltsfor nondestructivezener breakdown. Thanks to this it can be used as a voltage stabiliser.

7. SEMICONDUCTOR DEVICES 2 • TYPES OF DIODE • Tunnel diode +0V • Capacitance diode(varicap) is a special diode designed to have greater capacity. With the size of the voltage on the diode we can slightly change its capacity. This phenomenon is used for example in tuning circuits such as radio receivers. • PIN diodeis a special diode which has an intrinsic regulator in the middle.

8. Activities for students – mandatory slideTask, test, questions … . • 1. Define a P-N junction • 2. What is a diode? • 3. Write how to divide diodes. • 4. Name the types of diodes

9. Activities for students – mandatory slideTask, test, questions … . Two slides are best. • 1. Draw the schematic symbol for diodes • 2. Draw the schematic symbol for photodiodes • 3. Draw the schematic symbol for LED diodes • 4. Draw the schematic symbol for zener diodes • 5. Draw the schematic symbol for capacitance diodes

10. Bibliography • Václav Malina Poznáváme elektroniku I. • Adrian Schommers Elektronika tajemství zbavená. ISBN 3-92608-32-5