DSpace Université de Skikda
Dépôt numérique de l'université de skikda
Communities in DSpace
Select a community to browse its collections.
Recent Submissions
Electronics Components : Intended for Master 2 physics of materials
(Faculty of Sciences, 2025) Gacem , Amel
Electronic components are the basic building blocks of electronic circuits, essential for controlling
and manipulating electrical signals. Key components include resistors, which regulate current flow;
capacitors, which store and release energy; diodes, which allow current to flow in one direction; transistors,
used for amplification and switching; and inductors, which store energy in a magnetic field. These
components work together in circuits to perform specific functions, such as signal processing, power
management, and data transmission, forming the foundation of modern electronic devices like smartphones
and computers.
This document is a course support for electronic components intended for students in the Master 2 in
Physics of Materials, who wish to deepen their knowledge in the subject. This document aims particularly to
support the personal work of the student and to make the professor's work more effective. The aim behind
this course is to simplify the essential ideas contained in this course and to make them didactically simpler.
Consequently, the emphasis will be placed on physical explanations, demonstrations, and examples when
they are essential for the students' good understanding. In the context of this course, we are mainly interested
in presenting the content of the subject of electronic components in accordance with the official program.
The program is structured in the form of four chapters; these chapters allow the main concepts of electronic
components to be introduced in a simple way.
The first chapter, entitled Diodes, is devoted to presenting basic notions on semiconductors as an
introduction and more mainly to the in-depth study of PN junction diodes, their polarization, their modeling
and their different functions.
The second chapter, entitled Transistors, will be dedicated to the study of the different types of junction
and field effect transistors, their operating principle, their characteristics and their polarization in static
and dynamic regime.
The third chapter, entitled Transistor Amplifiers ; is devoted to examining their operation, their
equivalent diagrams, their main electrical characteristics and their applications in modern technology.
The last chapter deals with the different types of feedback in positive or negative amplifiers and their
general properties. the study of their influence on gain fluctuations and input and output impedances in
electrical circuits.
A large number of bibliographic references have been used to develop this document. Each chapter is
preceded by the main part of a course followed by assessment questions with their indicators. I hope that
this handout will serve as a valuable working tool for level License and Master in physics and electronics
students.
Practical Works of semiconductors : L3 Physics of materials
(Faculty of Sciences, 2025) GACEM , Amel
This manuscript of Practical Works of semiconductor module is dedicated to the third
year students license (L3) Physics of materials. It’s in accordance with the official program.. Any
student taking a semiconductor course can also use it profitably. It contains the description of
five practical work (5PWs) through which, the student should verify and deepen his theoretical
knowledge on the one hand and acquire experimental know-how on the other hand, and this in a
field as exciting as that of materials and in particular semiconductors.
All of this practical work can be carried out with simple means that any measurement
laboratory has. The results obtained are comparable to those from experiments using
specialized and expensive equipment. Each experiment described has 3 parts: the aim of the
manipulation which defines the objectives in a clear, precise and quantifiable way, a theoretical
part which consists of a theoretical reminder of the subject of the experiment and a practical
part in which the operating mode is described. The objective of this brochure is to provide a
support of practical work while aiming for a better exploitation of the teaching material
available at the level of our department of physics. This handout contains five practical works
that will allow students to better understand, assimilate, deepen, and visualize or highlight the
practical side of certain theoretical notions learning during the sessions of the courses and the
tutorials
Content of subject:
1. Hall effect.
2. PN junction.
3. MOS capacitance.
4. MOS transistor.
5. Applications of PN junction diodes.
I wish all our students a very good university course and a path full of success.
Polycopiated : Geometric and physical optics courses and exercises : For students of 2nd LMD physics speciality and 1rt Mater physics of material speciality
(Faculty of Sciences, 2025) DAIRA , Radouane
There is rectilinear propagation of light in a homogeneous medium. Propagation in a heterogeneous
medium leads to spatial fluctuations if the heterogeneity is not regular. The phenomenon is easily
observed above a flame: we see the objects located behind the flame. The observed spatio-temporal
fluctuations are due in this case to an irregular and rapidly variable distribution of the air index, which is
the seat of strong turbulence. Turbulence plays a particularly important and harmful role in astronomical
observation instruments where it is accentuated by the magnifications of the apparatus. Even slight
differences in the telescope tube (and in the atmosphere) can significantly alter the quality of images.
We will then assume that the path of different light rays passing through an optical instrument are
independent: this is the hypothesis of the independence of the light rays
Polycopiated : Practical Work of wave optics : For students of 3rd LMD Fundamental physics speciality
(Faculty of Science, 2025) DAIRA , Radouane
When two or more light waves are superimposed, it is generally not possible to describe the
observed phenomena in a simple way. Consider the case of two waves from a single point and
monochromatic source: in the superposition region, the luminous intensity varies from one
point to another between maxima which exceed the sum of the intensities of two waves taken
separately and minima which may be zero. This is the phenomenon of interference.
To specify the conditions that two waves must meet in order to interfere, it is not necessary to
have a precise idea of the nature of electromagnetic waves. It is sufficient to accept the
following principles:
1- Monochromatic light is composed of vibrations of a single frequency.
2- The electromagnetic vibrations propagate at the speed of light v = c n, with c: speed of
light and n: refractive index.
3- They are transverse to the direction of propagation.
4- They can be represented by a sinusoidal function.
5- The duration of light emission by an atomic emitter is in the range of 10-9 to 10-8 seconds,
that is to s ay that the waves emitted have a length between 30 cm and 3 cm. In other words,
each atomic oscillator emits a very fine monochromatic wave for a short time, then another
without phase relation to the previous one: the source is temporarily incoherent.
6- Each atomic oscillator works independently of its neighbors. There is generally no
permanent phase relationship between the radiations they emit. It is said that the source is
spatially inconsistent.
7- The wavelengths of the neighbouring oscillations are generally independent, in this case all
radiations are present in the continuous spectrum and the light is called white.
8- The radiation polarizations emitted by the various oscillators are independent and randomly
distributed. The source is not polarized
Course Handout Acoustic : 3rd year Licence (LMD) Sector Physic Specialty Materials Physic
(Faculty of Sciences, 2025) HADEF , Zakaria
This handout of the acoustics course was written for 3rd year students in the Physics of Materials License who are preparing, as part of the L.M.D. reform, a License in the field of "Material Sciences". It complies with the official program. It was written with the aim of providing a work and reference tool covering the knowledge required of them.
The manuscript is composed of five chapters, the first is mainly devoted to reminders on oscillations and resonance. The second chapter is reserved for understanding sound and sound sources. The properties of the acoustic wave are detailed in the third chapter. Medical diagnosis by ultrasound was studied in the fourth chapter. The last chapter is devoted to the presentation of the role of sound waves in prospecting and industry.
Although this manuscript has been prepared with the greatest care, it obviously remains improvable. I thank in advance anyone who sends me remarks or comments