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Reduktion der Verlustleistung integrierter CMOS-Schaltungen durch Anpassung an Signaleigenschaften
(1995)
Remote labs for students' design experiments are available in engineering education for several years. To ensure students' acceptance it is important to have an appropriate and stimulating user interface. So the usage and control of a remote lab has to be devised from the students' point of view. The contribution describes the FPGA (Field Programmable Gate Array) remote lab of the Bonn-Rhein-Sieg University and the design of its user interface from students' perspective.
Power consumption in digital circuits has been a research topic since the 1990s, and has been of significant importance in industry since at least 2000. This contribution investigates power consumption in engineering education by means of a systematic review; to determine the extent to which recent introductory textbooks on digital design address this topic. English and German textbooks that have been published since 2011 are selected, and their tables of contents are examined for the presence of sections or subsections on the topic of power consumption. A total of twenty-four textbooks match the inclusion criteria of our systematic review and, of these books, about 40% cover power dissipation in digital circuits. Thus, a significant number of authors regard power consumption as an important topic even for an introductory text. However, most authors devote only one or two pages to the topic of power dissipation, and 60% of the authors do not have a subsection on it. Therefore, a more thorough coverage of low-power design and implementation choices is often designated as supplementary material or more specialized textbooks are recommended.
Elektronik für Entscheider
(2017)
Dieses Buch gibt Nichtingenieuren, die sich beruflich mit Elektronik beschäftigen, die Möglichkeit, sich ein Stück auf dieses Fachgebiet zu begeben, um Aufgaben, Sprache und Vorgehensweise von Ingenieuren zu verstehen. Ziel ist es dabei nicht, nach dem Lesen dieses Buches eine elektronische Schaltung entwickeln zu können. Im Vordergrund steht vielmehr ein generelles Verständnis für die Zusammenhänge und Grundbegriffe der Elektronik.
Low power dissipation is a current topic in digital design, and therefore, it should be covered in a state-of-the-art electrical engineering curriculum. This paper describes how low-power design can be addressed within a digital design course. Doing so would be beneficial for both topics because low-power design is not detached from the systems perspective, and the digital design course would be enriched by references to current challenges and applications. Thus, the presented course should serve as an example of how a course can be developed to also teach students about sustainable engineering.
An Universitäten und Fachhochschulen ist die Mathematik-Ausbildung eines der Nadelöhre für angehende Ingenieurinnen und Ingenieure. Viele Studierende der Ingenieurwissenschaften scheitern in den ersten Studiensemestern an den Anforderungen der Mathematik. Lehrende, Fach- und Hochschuldidaktiker/innen und zunehmend auch Fachvertretungen und Verbände stellen sich die Frage, was an den Fakultäten und Fachbereichen getan werden kann, damit Studierende ihre mathematischen Fähigkeiten vergrößern und den anspruchsvollen Studienweg zur Ingenieurin oder zum Ingenieur meistern können.
Improving the study entry supports students in a decisive phase of their university education. Implementing improvements is a change process and can only be successful if the relevant stakeholders are addressed and convinced. In the described Teaching Quality Pact project evaluation data is used as a mean to discuss in the university the situation of the study programs. As these discussions were based on empirical data rather than on opinion, it was possible to achieve an open discussion about measures that are implemented. The open discussion is maintained during the project when results of the measures taken are analyzed.
Optical distortions, resulting from lens characteristics, non-aligned projection and variations in the light source, decrease the quality of projection displays. Knowledge of the sources and characteristics of these distortions allows their electronic correction. The integration of electronic image correction in the display controller IC allows high quality projection without additional components.
Multimediaprojectors require sophisticated image processing realized on limited board space. An architecture is presented that combines available components and a dedicated display controller for a flexible, compact and cost efficient display electronic. A basic version of the display controller is available as an ASIC, an advanced version has been prototyped as an FPGA.
Images displayed by projection systems can experience geometric distortions. These distortions can be compensated for by electronic correction, also called image warping. When the image that will be displayed is composed of several input sources, the different image layers have to be corrected independently from each other in order to achieve optimal image quality. A VLSI architecture for independent electronic correction of multiple image layers is proposed.
This Research to Practice Work in Progress Paper describes an outcome-based evaluation performed over three consecutive courses taught to electrical engineering students. The courses are delivered in the study entry phase: Computer Science 1 and 2 in the first and second semester and Digital Design in the third semester. The outcome-based evaluation was introduced to evaluate the progress made by students during the courses. Covering three semesters taught by two different lecturers, it gives a long-term view of the learning process in the study entry phase. The “outcome-based evaluation” methodology is proposed in literature and was introduced at our university at the end of 2016. Particular attention needs to be paid to formulating the questionnaire. The lecturers therefore cooperate with an evaluation officer from the university.
Since power dissipation is becoming a significant issue and requiring more consideration in the early design stage, circuit designers must now be experienced in low-power techniques to enhance designing digital systems. Therefore, when teaching low-power design techniques in electrical and computer engineering education, a tool or a method must be made available that enables students to estimate the power dissipation of their digital circuits during the design process. This contribution presents a novel approach, the low-power design remote laboratory system that has been developed at the Bonn-Rhine-Sieg University of Applied Sciences to estimate the power dissipation of a digital circuit remotely via the internet using physical instruments and providing real data. The design takes place at abstraction level and the real data is measured at the low level from the hardware devices. The low level provides more information, which is required for accurately measured values that are hidden at the high level. The technical performance results on using the remote system show that the students are enabled to implement their digital design and to meet the performance targets of reliability as well as to observe almost all influencing factors on the design’s power dissipation.
This paper investigates how learning objectives can be complemented by employing a remote system to improve teaching low-power digital circuits design. The low-power design laboratory system that has been developed at the Bonn-Rhine-Sieg University of Applied Sciences is composed of two laboratory types: the on-site (hands-on) and the remote laboratories to teach low-power techniques with laboratory exercises. This laboratory system enables online experiments that can be performed using physical instruments and obtaining real data. Digital circuit designers can observe the most influential factors in power dissipation during laboratory exercises in the on-site system and then use the remote laboratory to supplement investigating other factors. This contribution describes teaching activities performed during the Summer Semester 2015 using only the on-site system, and during the Summer Semester 2016 using the on-site and the remote systems. The assessment studies the achieved learning objectives, evaluates the laboratory reports with and without the support of the remote system, and analyses the students' use of the remote system. The assessment and the students' opinions provide positive feedback on this approach and verify that the remote laboratory system is a successful and effective complementary learning tool for remotely reusing the on-site laboratory and achieving additional learning objectives that cover most conceptual theories in low-power digital circuits design.
Seit 2012 wird an der Hochschule Bonn-Rhein-Sieg die Studieneingangsphase im Qualitätspakt Lehre gefördert. Ein wesentliches Anliegen im Projekt „Pro-MINT-us“ ist die Einbeziehung der gesamten Hochschule, um keine isolierten Maßnahmen anzubieten, sondern die im Projekt entwickelten Lehrideen nachhaltig zu verankern.
Guest lecturers from a different country can be very beneficial as students get a broader view on a subject and learn about applications not common in their home country. However, the cost and time required for traveling is a drawback. This contribution describes the exchange of teaching content between Germany and Argentina based on an e-learning approach. Short lectures are recorded on video and supplement the teaching of the local lecturer. The teaching content addresses digital logic design with FPGAs and is targeted to advanced students. The video lectures introduce an image processing algorithm for driver assistance in modern cars, which is a motivating application for students. The remote-lab allows the students to perform lab exercises with real hardware. The topic of lane detection for driver assistance is a specific application. The video lectures correspond to 1 or 2 weeks of teaching and can be used as a supplement for an existing course on digital design, FPGAs or signal processing.
Low-power is an important design goal for digital circuits. Accordingly appropriate development tools are necessary to understand, analyze and optimize power consumption. To stimulate students' interests and motivation, image processing is a well-suited application. An FPGA board was designed, developed and implemented for a lab setup. The purpose of this lab setup is to enable students to evaluate different implementations of an image processing application as a digital circuit and to estimate the consumed power. The paper points out the benefits of a new modular approach to the lab setup and shows how it supports the design of low-power applications and is well-suited to educate students.
Digitaltechnik
(2016)
Der Wechsel vom Lehren zum aktiven Lernen kann durch studentische Projekte gelingen. Studierende wenden das bisher vermittelte Wissen an und erleben dadurch Ihre eigene Handlungskompetenz während der Bearbeitung einer berufsnahen Aufgabenstellung. Lernziel ist hierbei die Steigerung der Handlungskompetenz, bestehend aus Fach-, Sozial-, Methoden- und Individualkompetenz durch die Aufgabenbearbeitung im Team. Insbesondere wird dabei auch Wert auf die Vermittlung und Erfahrung von Skills, wie z. B. Kooperationsfähigkeit, Kommunikationsverhalten und Arbeitsorganisation gelegt.
An electronic display often has to present information from several sources. This contribution reports about an approach, in which programmable logic (FPGA) synchronises and combines several graphics inputs. The application area is computer graphics, especially rendering of large 3D models, which is a computing intensive task. Therefore, complex scenes are generated on parallel systems and merged to give the requested output image. So far, the transportation of intermediate results is often done by a local area network. However, as this can be a limiting factor, the new approach removes this bottleneck and combines the graphic signals with an FPGA.
This paper describes FGPA-based image combining for parallel graphics systems. The goal of our current work is to reduce network traffic and latency for increasing performance in parallel visualization systems. Initial data distribution is based on a common ethernet network whereas image combining and returning differs to traditional parallel rendering methods. Calculated sub-images are grabbed directly from the DVI-Ports for fast image compositing by a FPGA-based combiner.
