Course: 2022/2023

Electronics Systems

(14823)

Requirements (Subjects that are assumed to be known)

Linear Systems, Components and Electronic Circuits

The aim of this course is to provide the students with a solid knowledge in a number of key horizontal techniques in electronic systems. During the development of this subject special emphasis will be placed on the application of these techniques to specific equipment and subsystems commonly used in telecommunications, both for signal processing as well as equipment supply. To achieve this objective, students will acquire the following abilities:
- Understand the operation of electronic circuits with negative feedback and their frequency response
- Analyze and evaluate the most common oscillator circuits
- Understand the functioning of real operational amplifiers and their linear and nonlinear applications
- Understand the operation of the most commonly found electronic subsystems used in signal processing and communications such as timers,
VCOs and PLLs
- Understand the operation and applications of power supplies and power equipment for telecommunication systems
In terms of general abilities or skills, the following areas will be worked upon throughout the development of the subject:
- Ability to work cooperatively in a team, knowing how to adapt the requirements and working conditions of the subsystem developed so that
they operate correctly within a global system which is not only electronic. This aspect will be covered by means of the development of
examples and case studies.
- Ability to identify, formulate and solve problems in Engineering
- Ability to use techniques and tools required in modern engineering to reduce the equipment development time

Skills and learning outcomes

Description of contents: programme

The structure of the subject is formed by three thematic blocks. Following is a indication of the content taught in each of these blocks:
BLOCK 1
- Electronic Feedback Circuits
o Basic concepts of the theory related to feedback electronics
o Electronic feedback circuit topologies
o Calculation of the gain, input impedance and output impedance in feedback circuits.
o Conception of the practical or approximate method used to solve negative feedback circuits. Example
o Basic configurations of the beta network according to the different topologies
o Study of feedback circuits for each one of the different topologies.
- Frequency Analysis of Electronic Feedback Circuits
o Frequency analysis of a feedback amplifier
o Stability study of a feedback amplifier using the Bode diagram
o Compensation methods. Exercices
- Oscillators
o Start up condition and oscillator maintenance
o General configuration of an oscillator.
o RC oscillators:
o Amplitude limiters
o LC Oscillators: Colpitts, Hartley and Clapp Oscillators
o Crystal Oscillators (Xtal)
BLOCK 2
- Real Operational Amplifiers and their Applications
o Ideal operational amplifier (review)
o Real operational amplifier characteristics
o Linear applications (review)
o Active filters as linear application
o Non-linear applications
- Electronic Subsystems for signal processing and communications: Integrated timers and applications. PLLs and Applications.
o The 555 integrated timer: monostable, astable and VCO modes
o PLLs:
- Blocks diagram and working principle
- PLL components: phase detectors, filters, VCOs
- PLL transfer function. PLL types.
- 1st order PLL. Examples.
- 2nd order PLL. Examples.
- PLL Applications.
BLOCK 3
- Power Supplies. Voltage Regulators and Switching DC/DC Converters
o Series - Shunt feedback in linear voltage regulators
o Basic design of a linear voltage regulator
o Power and efficiency calculations
- Switching Voltage Regulators
o Fundamentals of switching DC/DC Converters
o Basic operation and design of Buck converter
o Negative feedback in a switching DC/DC Converter
o DC/DC and AC/DC Converters for Telecommunications.SAIs
- Energy Converters
o Basic analysis of a photovoltaic generator
o Description of other systems related to electrical energy generation.

Learning activities and methodology

The teaching methodology will include::
- 48% Magisterial Classes (2.88 ECTS), where the students will be presented with the basic knowledge they must acquire. Students will be supplied with lecture notes and key reference texts which will enable them to complete and acquire a more in depth knowledge of the subject.
- 38% Problems Classes (2.28 ECTS) these are aimed at the solving of exercises, examples within the context of real case studies and tests for continuous evaluation process. These classes will be complimented with the resolution of practical exercises on behalf of the student which in some cases may require the use of computer based simulation programs.
- 14% Laboratory Practicals (0.84 ECTS), here the student will design, construct and measure electronic systems within the area of communications and real applications.
- Group tutorial: At least a group tutorial will be carry out the recovery week as revision and final exam preparation. (See the weekly programming for additional details)

Assessment System

- % end-of-term-examination 60
- % of continuous assessment (assigments, laboratory, practicals...) 40

Basic Bibliography

- A. S. SEDRA y K.C. SMITH. "Microelectronic Circuits". Oxford University Press, New York, 1998.
- J. MILLMAN, A. GRABEL. "Microelectronics". McGraw-Hill, New York, 1987.
- M. H. RASHID. "Microelectronic Circuits: Analysis and Design". CL-Engineering, 2010.
- N. MOHAN. "First Course on Power Electronics". Publisher: MN Power Electronics (MNPERE); Year 2009 Edition.
- P. R. GRAY, R. G. MEYER. "Analysis and Design of Analog Integrated Circuits". John Wiley & Sons, New York, 1993.

The course syllabus may change due academic events or other reasons.