This report present the design and manufacturing of a wide-band driver amplifier placed in radar module for airborne applications. The major goals for the amplifier were a high efficiency and to deliver a predefined output power. To reach the second goal an additional preamplifier had to be constructed. The amplifiers were constructed in three steps: Design and Layout in the software Microwave Office, Mounting components and Verification. The driver amplifier was decided to be a push pull configuration consisting of two parallel transistors biased in class AB.

Softube has developed DSP-card and software for simulation of the sound of old tube amplifiers. The purpose with this thesis is to design a compact amplifier with high power to function together with the DSP-card and build a unit that can replace several other guitar amplifiers. The advantages with that kind of solution could be that it would be cheaper, easier to carry and easier to stor than the real amplifiers. The amplifier that has been designed is of class D type with digital PWM modulator. There is several types of amplifier modules on the market that use analog input signal, but if one of them would be used a D-A converter is needed on the DSP card.

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..

This report is an outcome of a master degree project at Linköpings University in co-operation with Micronic Laser Systems AB. The purpose with this master degree project was to investigate how to implement a receiver in a data transfer system. The system consists of several data channels, where every channel consists of three parts: driver, transmission lines and receiver. The driver send low amplitude differential signals via the transmission lines to the receiver that amplifies and converts it to a single-ended signal. The receiver has to be fast and be able to feed an output signal with high voltage swing.

The last few decades the development in the field of electronics has been huge. The components performance gets better at the same time as the manufacturing cost decreases. Many of the design moments that have to be done, are done automatically today, but it can get better. Especially for analog circuit design.At Electronic System in Linköpings universitet, research is in progress to develop a tool that can design analog circuits in reasonable time. It means that it has to size the components (transistors, resistances, capacitances etc), so that the circuit can fulfill the performance requirements.

This paper describes a method for wireless energy transfer via near-field electromagnetic inductionthat is inexpensive, simple and can be applied to almost any type of system, regardless of size andenergy demands.The method uses a primary unit consisting of an oscillator, amplifier and inductive coil thattransfers energy to a secondary unit consisting of a coil, rectifier and voltage regulator. Two typesof oscillators and several amplifier designs were realized and evaluated together with a multitudeof flat coils of both monofilar and bifilar type.The results show that it is important to use an oscillator whose frequency is dependent on theinductance of the connected transmission coil, such as the Colpitts oscillator. This is preferable toan oscillator with a preset frequency, such as a Schmitt-trigger oscillator..

This paper describes a method for wireless energy transfer via near-field electromagnetic inductionthat is inexpensive, simple and can be applied to almost any type of system, regardless of size andenergy demands.The method uses a primary unit consisting of an oscillator, amplifier and inductive coil thattransfers energy to a secondary unit consisting of a coil, rectifier and voltage regulator. Two typesof oscillators and several amplifier designs were realized and evaluated together with a multitudeof flat coils of both monofilar and bifilar type.The results show that it is important to use an oscillator whose frequency is dependent on theinductance of the connected transmission coil, such as the Colpitts oscillator. This is preferable toan oscillator with a preset frequency, such as a Schmitt-trigger oscillator..

This Master?s thesis has governmental cultural policy in focus and concludes a textual idea analysis of the governmental bill Time for culture. (Tid för kultur.) The aim of the study is to examine how the government is seeking legitimacy concerning the cultural policy. One of the starting points is that the society has changed over time in terms of for example increased globalization and multicultural and even the market adjustment is more evident. Also the economical basis in the society is different nowadays.

This thesis examines the subject of change in public administration from an instrumental and an institutional structure perspective. The purpose of the thesis is to examine whether institutional structures affect the development of instrumental structures and if it in turn is possible to affect institutional structures by changing the instrumental structures. This case study is primarily based on a series of deep interviews with senior administrators and politicians within two new administrations in the municipality Karlstad, both which have been created by merging several smaller administrations, but also thorough analysis of several official document such as protocols from the municipal council meetings, Tja?nsterskrivelser and internal PMs.   The result of the analysis indicates that both institutional structures and the forming instrumental structures affect each other and  that their ability to affect each other depends on the dominance over the organization each structure has.  In my specific research case we can see that the institutional structure of the city-technical and housing administration has affected the outcome but the institutional structure of the cultural and tourism administration hasn?t.  While the structural change of the city-technical and housing administration hasn?t effected the institutional structure but the structural change of the cultural and tourism administration has affected the institutional structure of this specific administration..

The purpose of this paper is to see which ethical content arguments have in the debate about wolfhunting, particularly with regard to the Svensk Jakt respective Tidningen Djurens Rätt's arguments. The method used in this paper is the analysis of arguments in which I investigate the pro and contra arguments of the four authors of the articles that I have chosen to study. I will avail myself of theories from Carruthers and Franklin. Analysis shows that the authors of the Swedish hunting above all have a ecocentric view of the wolf where it is an instrumental value for the ecosystem, and the authors of Djurens Rätt's has especially a biocentric view of the wolf where it may be an absolute value, but they can also extend to the that the wolf has instrumental value in the ecocentric perspective. The discussion has shown that Djurens Rätt's and Svensk Jakt has a common position that is an ecocentric perspective where the wolf has instrumental value, even though they believe that different actions are different law to protect the species and the ecosystem..

This study is based on discussions among Swedish brass teachers about teaching other brass instruments than their main instrument. Why do some choose to teach only with the help of their main instrument while others use their secondary instruments as well? What are the advantages and disadvantages and how do they look upon other ways of thinking in this matter?In addition, the study examines brass teachers? views on the balance between pedagogical and instrumental skill, as well as their views on teaching sound, technique and expression in relation to the age of the student.A questionnaire was used and anwered by 24 teachers with teaching experience in municipal music schools ranging from 7 months to 35 years. The results indicate that pedagogical skill is always important, whereas the importance of instrumental skill increases as the student gets older and more experienced. The advantage of teaching with the help of the main instrument is that one always keeps a high musical and technical level.

A current conveyor is an active building block that can be used to implement most active and passive components. It differs from the operation amplifier in that it uses current instead of voltage. The current conveyor also has significantly higher voltage gain over a broader frequency range. To simplify the construction of analogue circuits and increase the construction efficiency it is desirable to use a top-down methodology. This means that the whole system is partitioned into a hierarchy of subsystems.

Målet med detta examensarbete är att ersätta den tidigare lösningen av sensorfingret med andra komponenter, eller hitta en annan sensor med motsvarande funktion.Arbetet har begränsats av att ESAB vill ha ett mekaniskt finger för användarvänlighetens skull. Efter en förundersökning av olika typer av sensorer har vi valt att använda oss av trådtöjningsgivare som sensorer till det mekaniska sensorfingret. I och med detta val behövde vi även komma med ett teoretiskt förslag på en mekanisk upphängning av sensorfingret.Vi har byggt upp två separata Wheatstonebryggor med varsin instrumentförstärkare (INA125). Utsignalen från bryggorna är relativt liten och behövde förstärkas cirka 2000 gånger.Nollbalansering av bryggorna har skett manuellt med potentiometrar men vi har även gett ett förslag på en lösning där nollbalansering kan ske med ett enkelt knapptryck. Knappen är placerad på upphängningen på ett sådant sätt att man inte kan trycka oavsiktligt på knappen.Resultatet av arbetet är en uppkoppling på en experimentplatta samt förslag på hur upphängningen och sensorfingret designmässigt kan se ut.För vidare arbetsgång behövs en prototyp för att testa livslängden och ta reda på vilken känslighet som är mest optimal..

In this Master's thesis, a direct-conversion receiver front-end has been designed in a 0.18um CMOS technology. Direct-conversion receivers (DCR) have obvious advantages over the heterodyne counterpart. Since the intermediate frequency (IF) is zero, the problem of image is circumvented. As a result, no front-end image reject filter is required and the channel selection requires only a low-pass filter, which makes it easy to integrate directly on chip. However, the DCR also suffers from several drawbacks such as extreme sensitivity to DC offsets, 1/f noise, local oscillator (LO) leakage/radiation, front-end nonlinearity and I/Q mismatch.

Violent crime can traditionally be classified as a reactive or an instrumental aggression. A reactive aggression is often characterized by some sort of provocation by the victim and the act is impulsive and the offender reacts by harming the victim. The provocation can be a threat, an insult or an attack and the act can be said to be a reaction induced by emotions. An instrumental act of violence however, often described as planned, targeted and emotional cold. The goal of the act can be to acquire money or power to maintain their status.