I det här examensarbetet har jag tittat närmare på hur man med hjälp av en transformator kan höja signal/brus-förhållandet för en mikrofonsignal som förstärks av en förstärkarkrets. Arbetet baseras sig på en psykoakustisk brusmätning enligt standarden ITU-468-4.Ett bra förhållande mellan signal och brus är alltid eftersträvat i en krets. När signalen i kretsen är svag kan signalen i värsta fall försvinna i bruset. Arbetet kommer att titta på hur man definierar och mäter signal/brus-förhållanden på en förstärkare samt vad som påverkar signal/brus-förhållandet. Arbetet kommer visa att med hjälp av en spänningstransformering av en in-signal så kan ett bättre signal/brus- förhållande ut från en serie förstärkare erhållas..

We have different kinds of signal processing everywhere around us in our everyday life, in our cellphones, when we are listening to music, watching TV etc. This makes signal processing a very interesting and important technical area, where the demand of skilled engineers sets the limit of what is possible.Working with signal processing requires in-depth knowledge in areas such as mathematics, physics, electronics, and other related areas. For this, it has traditionally been demanded by a talented developer to also master the advanced programming languages such as C / C + + and Assembler.This has begun to change; today there are several companies that offer graphical development environments for signal processing, environments where programming skills are not needed anymore, and the focus can be on signal processing instead.The goal with this project is to build a corresponding graphical development environment to reach an understanding of what is required of these systems, and also to grasp what opportunities that are available within graphic programming. Inspiration for the work has partly arise from some of the tools available on the market, and partly from previous theses that have been written about graphic programming.The challenge lies in creating a program that can execute signal diagrams in real time from given signal blocks, and be able to handle feedback loops in an efficient way and to do so at the lowest "cost" in terms of clock cycles as possible. This should also be compared against to code, compile and run a complete signal diagram directly.To increase the usability it should also be possibility to externally manage in real time the parameters of the signal diagram during execution.The interface is a separate program, which is to some extent similar to Matlab Simulink, where a signal diagram is drawn up graphically by connecting wires between different signal blocks.

The aim of this thesis was to examine how newspaper journalism represented the celebrity Anna Anka. Which roles and qualities did the media ascribe Anna Anka and in what way did the media frame her as a woman.We examined texts and photographs from two Swedish newspapers, Aftonbladet and Dagens Nyheter, 16 texts were analysed. The method we used were discourse analysis with focus on relations, identities and representation.The result showed that Anna Anka was represented in an essentially equal way in both newspapers. The image of Anna Anka seems to be multifaceted. In the texts Anna Anka becomes a symbol for conflicts that emerge in discourses regarding gender, celebrity and Swedish values.

The data acquisition system COMET developed by Saab AB contains a unit for signal conditioning and A/D conversion, called KSM. The varieties in signal conditioning constitutes of a number of specific PBAs and maintenance as well as reconfiguration of these are complicated not to mention costly. This thesis has aimed to investigating whether the signal conditioning circuits can be replaced by a general purpose, programmable solution. If so, how can this be done? The development has been carried out by evaluating ideas through the use of a laboratory environment and has resulted in an analog design for laboratory purpose.

The purpose with the report is to show that it is possible to design a class-D amplifier, using a programmable FPGA mounted on a developing card from Xess and a H-bridge. The FPGA was programmed in VHDL which is the language the software from Xilinx use to implement a logical function into the FPGA The logical function corresponds to a modeling of the music signal and the modeling can be described as a comparator which compare the music signal with a triangle wave and as a out signal produce a pulse width modulated (PWM) signal. The report is also a review and evaluating of two different modulating technologies, AD- modeling and BD-modeling. A detailed part about how the H-bridge was designed and how it works. The result of this project is a working audio amplifier to a significant lower price than the products in todays market..

Det här är ett examensarbete som utgår ifrån Anna Petrus (1886-1949). Syftet är att ta fram en artefakt som utgår ifrån Anna Petrus konstnärskap och mest kända motiv "lejonet." Mitt mål är att ta fram en artefakt som jag, hon och hennes gamla arbetsgivare Svenskt Tenn står bakom. Artefakten ska tydligt kunna härledas till Anna Petrus konstnärskap och samtidigt vara nutida och inom ramarna för produktdesign.Examensarbetet har vuxit fram som ett resultat av min uppsats. Min uppsats har vuxit fram som ett resultat av min önskan om en djupare förståelse för Anna Petrus och hennes konstnärskap. Och min önskan om en djupare förståelse för Anna Petrus har vuxit fram som en metod för mig att kunna ta fram en artefakt som jag upplever att Anna Petrus står bakom.Introspektion, informella intervjuer/besök, skisser och litteraturstudier har legat till grund för arbetet som har en postmodern grund och där mitt förhållningssätt är introspektionistiskt-hermeneutiskt.I projektet har Anna Petrus och jag själv flätats samman, PETRUS har konstruerats.

To be able to evaluate different radio waveforms in a laboratory environment FOI in Linköping has developed an experimental system for radio communication called Rasmus. The system consists of a transmitter, a channel emulator and a receiver. The transmitter modulates a digital signal to a desired analogue waveform. The channel emulator is used to simulate a real radio channel. The channel emulator distorts the signal by splitting it up in several propagation paths.

Den kvinnliga konstnären och hennes förutsättningar till utbildning och arbete beskrivs och utgör den fond mot vilken Anna Ankarcronas liv och konstnärskap speglas. Tiden är det sena 1800-talet och det tidiga 1900-talet i Sverige, alltså den tidsperiod som utgör Annas levnad. Sociala mönster och samhällsstrukturers påverkan på konstlivet och kvinnornas rum där belyses. Uppsatsen beskriver också ett glömt konsthantverk, hyllningsadressen, som var en del av Anna Ankarcronas arbete..

The purpose of this project was to produce signal relay stations that could receive information via 2.4 GHz radio and relay the information to a designated target station. If a relay station was located outside of signal range for the target station it was supposed to utilize other relay stations to transfer the information to the target station, so called multi-hop.The would-be application of the relay stations was orienteering. When an orienteer punches a checkpoint the signal stations would relay information of who punched the control, when it was punched and the checkpoint that was punched to the speaker tower in the goal area.The work resulted in prototypes which fulfilled the statement of purpose and was tested at an orienteering competition with satisfactory results. The performance of the prototypes was tested and found adequate for the would-be application..

This thesis studies the negative impact that control signal saturation may have on a controlled system. Different methods that are used to compensate for this problem are also studied and evaluated. Both sensitivity to disturbances and the effect the method has on the systems'ability to follow a reference signal will be examined. Stability will be discussed, but no conclusions whether the systems are stabilized or not can be drawn. Control signal saturation will lead to a slower behavior in general.

This was a project of creating an animated music video for Anna vonHausswolffs song Something is missing. By working with animation Iwanted to broaden my expertise in visual communications. This hasbeen an exploratory work in how I could translate my illustrations tomoving images in the program Adobe Aftereffects. I have formed myown narrative by creating a storyboard. I worked with illustrated setdesign, created an atmosphere in the film and experimented with howto tell a subtle story.

This report tested the possibility of using induction as a mean for transferring data and power so that it can be implemented as a communication medium between a terminal and measuring head mounted in a measuring frame. This would eliminate the need for the cable bunches that are used today. For testing, signal generators were used to generateFSK-signals and were transferred with the help of inductors to the oscilloscope for signal detection, this to see how the coils used in the tests behaved. Simulations of a PLL were performed to see how good it could handle FSK-demodulation. With the help of a PLL IC and the simulations a working FSK-demodulator could be assembled.

SAAB Aerotech division FGR in Arboga builds and develops equipment and components used in both military and civilian applications. To build a test system for a specific project that SAAB is responsible for requires a simple signal generator that can provide a pulse modulated signal. The need to buy a new advanced signal generator for example from Agilent is not as profitable as the instrument is expensive and contains features that SAAB does not require in their applications and test systems. That was the reason why SAAB offers two students a thesis where the goal is to construct a signal generator in accordance with what SAAB requests.This thesis contains several different phases. The first step was a meeting with our supervisor Mats Bergman and by reading the data sheets for components to be used in the project, with these information and specifications that we have received from SAAB we started to construct the signal generator.What we did during the construction work was to simulate and draw a schematic to be able to design the circuit board.

This work is an experimental study where knock sensor placements are investigated using engine tests. The aim is to studythe quality of the signal from knock sensors and how the signal for engine control is affected at different sensor locations on Scanias, engine DC13. To find out at witch position on the engine youcan get a usable signal for engine control, the engine is running while the knock sensors with advanced measurement equipment is connected to the engine. Evaluation of signals from the knock sensors are made in the computer program Matlab. The program is producing a seriesof plots, from these plots it is visually possible to draw conclusions and find connections.

The Swedish foreign minister Anna Lindh was murdered on September 10 2003. The police pursuit for the man that murdered her was initiated immediately. Two weeks later, the police arrested the 24-year-old man that six month later would be sentenced to imprisonment for life for the murder of Anna Lindh. The main purpose of this essay is to examine how the man that murdered Anna Lindh was described in Aftonbladet and Expressen from the time of his arrest to the sentence of guilty. One part of the purpose of this essay is also to inquire how the Swedish evening press paid regard to the ethical publicity rules in their descriptions.