Course detail

# Electronic Devices

Semiconductors physics. PN-junction. Semiconductor Diode. Bipolar junction transistors. Field effect transistors. Power electronic devices. Optoelectronic devices.

Learning outcomes of the course unit

The knowledge about electronic devices and skills in practical use of electronic devices. Based on the verification of the student's knowledge and skills in seminars, laboratory work and in the written exam, after completing the course the student is able to:
Describe the arrangement of the PN junction and explain the formation of the space charge and the formation of built-in-voltage in the junction.
Describe in detail the mechanisms that affect the PN junction at steady state and in forward and reverse polarization.
Define the width of the PN junction and explain its dependence on concentration of doping impurities and applied voltage.
Define the meaning of Shockley ideal diode equation and to discuss current-voltage-characteristics of diodes including the influence of technological parameters.
Define the barrier and diffusion capacity of the PN junction.
Define and explain breakdown mechanisms of PN junction: Tunnel-breakdown, avalanche-breakdown, thermal- breakdown and surface- breakdown.
Explain the operation of PN junction in following circuits: Rectifier, voltage stabilizer, capacitance diode, photo-diode, light emitting diode (LED) and current controlled differential resistance.
Describe the structure of the bipolar transistor and explain its operation.
Design and analyze class-A-amplifier and switch with bipolar transistor.
Explain the principles and application of linear and nonlinear models of bipolar transistor.
Describe the structure of unipolar transistors and explain their operation.
Design and analyze class-A-amplifier and switch with unipolar transistors.
Describe the structure of a thyristor and its equivalent circuit and to explain its operation.
Describe the structure of the triac.
Define the principle of phase control of power switching devices.
Give examples of typical wiring of circuits with thyristor and triac.
Describe the mechanisms of interaction of light with matter.
Define the differences between photometric and radiometric quantities.
Explain the mechanisms of photoluminescence and electroluminescence.
Describe the principles of different types of lasers and explain the benefits of their use.

Prerequisites

The subject knowledge on the secondary school level is required.

Co-requisites

Not applicable.

Recommended optional programme components

Not applicable.

Not applicable.

Planned learning activities and teaching methods

Lectures, numerical practical classes, laboratory practical classes.Teaching methods depend on the type of course unit as specified in Article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Laboratory practicum - 30 points; minimum 20 points.
Final exam - 70 points; minimum 30 points.

Language of instruction

Czech, English

Work placements

Not applicable.

Course curriculum

Conductors, semiconductors, insulators. Semiconductors physics. Band diagrams of semiconductors. Intrinsic, p-type, n-type semiconductors, donors, acceptors, electrons and holes. Concentration of carriers in semiconductors. Electrical conductivity of semiconductors, drift current, diffusion current, Generation and recombination of carriers in semiconductors.
Junctions. PN-junction. PN-junction in steady state, depletion layer, built-in voltage. Barrier and diffusion capacitance of PN junction. Band diagram without external voltage and for forward and reverse biased junction . Current-voltage characteristics. Breakdown of PN junction.
Semiconductor Diode. Current-voltage characteristics. Diode as rectifier, reference voltage source, Differential resistance of forward biased diode, diode as voltage controlled resistance and as a switch.
Semiconductor Diode. Special types of diode: varicap, varactor, tunnel diode, Schottky diode. Fotodiode. Structure PIN, PIN-diode.
Semiconductor Diode. Technology of semiconductor diode. Typical cuircuits using semiconductor diode. Typical parameters of semiconuctor diodes.
Bipolar junction transistors (BJT). Structure and principle of operation (transistor effect). Current-voltage characteristics of common emitter configuration. Operation modes (active normal, active inverse, saturation, closed).
Bipolar junction transistors (BJT):Linearized small-signal models of bipolar transistors, h-parameters, y-parameters. The first and the second breakdown of the transistor, breakdown characteristics. The limits of transitor operation (safe operating area).
Bipolar junction transistors (BJT):Simple circuits with transistors. DC properties (operating point). Transistor as an amplifier in CE, CB configuration, emitter follower, current transfer, voltage transfer, input and output impedance. Transistor as a switch.
Field effect transistors: JFET, MOSFET. Types of transistors: n-channel, p-channel, enhancement type, depletion type. Structure, principle of operation. Linear regime and saturation. Current-voltage characteristics. Transistor as a current source, voltage amplifier, switch and controlled resistance.
Field effect transistors. Linearized small signal low-frequency model. Structure CMOS. Field effect transistor as a memory element. Structure CCD.
Power electronic devices. Silicon-controlled rectifier (SCR, thyristor): structure, equivalent circuit, principle of operation (the thyristor effect), current-voltage characteristics (forward blocking region, forward conduction region, reverse blocking region, reverse avalanche region, forward blocking voltage, holding current). Related devices.
Optoelectronic devices Materials for light detectors, absorption of light, penetration depth. Photoresistor, photoconductivity. Phototransistor. Light emitting diode. Semiconductor laser. Solar cells.

Aims

Introduce students to electronic devices and their applications and to the basic terminology in English as well as Czech.

Specification of controlled education, way of implementation and compensation for absences

Laboratory practical classes. Numerical practical classes.

Classification of course in study plans

• Programme AJEI-H Bachelor's

branch H-AEI , 1. year of study, summer semester, 3 credits, compulsory

#### Type of course unit

Lecture

13 hours, compulsory

Teacher / Lecturer

Fundamentals seminar

13 hours, compulsory

Teacher / Lecturer

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