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 Transistors 2 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. TRANSISTORS 2 • UNIPOLAR TRANSISTORS • -transistors driven by the electric field • -has (at least) three electrodes, which are referred to as drain, gate, source • -unipolar transistors are referred to as N-FET or P-FET.

3. TRANSISTORS 2 • Electrotechnical schematic symbol of a JFET transistor

4. TRANSISTORS 2 • Electrotechnical schematic symbol of a transistor MOSFET induced

5. TRANSISTORS 2 • Electrotechnical schematic symbol of a transistor MOSFET embedded

6. TRANSISTORS 2 • TYPES OF UNIPOLAR TRANSISTOR JFET- (Junction FET) control electrode(gate) is formed by reverse polarized transition PN. • -transistor works in a so-called depleted mode - at zero voltage it is fully open • - in the reverse polarized transition the conductive channel narrows • MOSFET- (Metal Oxide Semiconductor FET) control electrode(gate) is isolated from the rest of the transistor oxide. It can work in the depleted and enriched mode. • -in the transistor MOSFET with an induced channel N there is a conducting channel only after applying the positive U, thus it only works in the enriched mode. • - for transistors with a channel with a semiconductor-type P there are opposite voltages

7. TRANSISTORS2 • TYPES OF UNIPOLAR TRANSISTORS -MESFET- (Metal Semiconductor FET) control electrode(gate) is formed by reverse polarized transition metal-metalloid. -MISFET- (Metal Insulated Semiconductor FET) Common name for a transistor with an insulated control electrode. Insulator need not be just carbon (eg ... nitride).

8. Activities for Students – mandatory slideTask, test, questions … . • 1. What is a unipolar transistor? • 2. How many electrodes has a unipolar transistor? • 3. What are thenamesoftheelectrodes? • 4. Describe the basic types of unipolar transistors

9. Activities for students – mandatory slideTask, test, questions … . Two slides are best. • 1. Draw the schematic symbol for a JFET transistor. • 2. Draw the schematic symbol of a transistor MOSFET induced. • 3. Draw the schematic symbol of a transistor MOSFET embedded.

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