Design of Electronic Devices
FEKT-BKC-KEZAcad. year: 2019/2020
Design and properties of signal lines, supply lines and distribution frames - suppression of interference and ground loops.
Parasitic events and their suppression - coupling in input and output circuits, parasitic capacitances and inductances, thermoelectric voltage, overvoltage on inductive load, reflections on lines, crosstalk. Electric and magnetic field screening, equipotential guarding. Choice of components and application recommendation - discrete elements, operational amplifiers, comparators, electronic switches, A/D and D/A converters, sample-and-hold elements, digital circuits, microprocessors. Mechanics design: regulation, control and indication elements - lay-out on the front panel, instrument housing design, heat removal, thermostatic elements. Printed circuits, wired printed circuits, connection of conductors and components. Safety requirements in instrument design. Methodology for the debugging of electronic device.
Learning outcomes of the course unit
Students will acquire concrete application knowledge of electronic instrument design, which is otherwise obtained only through long-term development practice. Emphasis is laid on understanding the physical essence of parasitic events so that their knowledge can be applied to other cases. Students will learn to foresee and anticipate the appearance of many problems arising in the development of new instruments in both the electrical and the mechanical parts of the design. They will be able to design supply distribution and its blocking, implement shielding critical parts of equipment, they will know the application principles for various electronic circuit elements. They will be familiar with the principles of designing instrument cases inclusive of the lay-out of control and indicator elements on the front panel. They will be informed about the design of refrigeration of power elements inclusive of heat removal from instrument cases. The will learn the methodology of debugging electronic systems.
Basic knowledge of electrical engineering theory and elementary basics of analog and digital technology is required.
Recommended optional programme components
Recommended or required reading
VRBA, Kamil. Konstrukce elektronických zařízení. Elektronická skripta, Brno: VUT v Brně 2017
VRBA, Kamil a HANÁK, Pavel. Vybrané problémy konstrukce elektronických přístrojů pro integrovanou výuku VUT a VŠB-TUO, Brno: VUT v Brně 2015
NIKNEJAD, Ali, M.: Electromagnetics for High-Speed Analog and Digital Communication Circuits. Cambridge: Academic press 2007
ARCHAMBEAULT, Bruce a DEWNIAK, James. PCB Design for Real-World EMI Control. Heidelberg: Springer 2002, ISBN: 978-4757-3642-7
FAIRCHILD: Analog - mixed signal, interface, logic, non-voltatile memory, power products. Fairchild Semiconductors, www.fairchildsemi.com
NATIONAL SEMICONDUCTOR: National Analog and Interface Products Databook. Santa Clara: National Semiconductor 1999
LINEAR TECHNOLOGY: Linear Applications Handbook. Milpitas: Linear Technology 1999
Planned learning activities and teaching methods
Techning methods include lectures, computer laboratories and practical laboratories. Course is taking advantage of e-learning (Moodle) system. Students have to write a single project/assignment during the course.
Assesment methods and criteria linked to learning outcomes
Requirements for the completion of a course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.
Up to 20 points can be had for design exercises. Part of the design exercises can be in the form of individual project. The examination proper is a written examination and up to 80 points can be awarded for it. The examination is focused on testing the knowledge of application principles in the design of electronic instruments, from the viewpoint of both electronic and mechanical solutions.
Language of instruction
1. Construction of signal links
2. Power supply design: distribution to individual systems, distribution on PCBs, power supply decoupling for analog and digital circuits
3. Grounding (earth) distribution, galvanic isolation of individual systems: low-frequency transformer, impulse transformer, optoelectronic, digital isolators with capacitive coupling
4. Electrical field shielding, magnetic field shielding, equipotential shielding
5. Selection of components and their application principles: RLC passive elements, connectors, piezoelectric crystal oscillators, overvoltage and overcurrent protection, operational amplifiers, comparators, sample-and-hold circuits, ADC and DAC converters, digital logic
6. Mechanical design: control and display elements and their layout on the front panel, types of instrument cabinets, resistance against shock and vibration, resistance to different environments, EMC protection
7. Heat removal from components and instrument cabinets, temperature stabilization (thermostats)
8. Component interconnect methods - manual and machine soldering, solder joints defects
9. Safety requirements for electronic devices design
10. Circuit debugging: fault localisation in analog circuits, troubleshooting in digital circuits
To be introduced to practical principles of designing electronic instruments and devices as regards both electrical and mechanical aspects. The course is practically suitable for all branches of BSc studies because it offers a close look at the actual work of a designer of electronic instruments and devices.
Specification of controlled education, way of implementation and compensation for absences
Design exercises are obligatory. If part of the design exercises is in the for a individual project, submitting the project is one of the conditions for awarding the credit. Justified absence from design exercises can be made up after prior arrangement with the instructor, usually in the credit week.
Classification of course in study plans