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As summer is passing by I'm just about to finish my education at the Friedrich Alexander Universität in Erlangen and soon will present my diploma thesis at the Fraunhofer Institute for Integrated Circuits IIS. In this category one can find my recent professional projects including publications.

In my diploma project I did research on efficient switched mode amplifiers at RF frequencies. I analyzed different power efficient amplifier concepts and evaluated them in regard to constant envelope signals. After an analysis of loss mechanisms I have simulated a class D amplifier which I have afterwards assembled and characterized.
(soon)

In 2009 I've designed a high dynamic, low noise RF receiver with a center frequency of 868 MHz. I'm using a double conversion superheterodyne concept together with stacked SAW filters for best image rejection and a low power sigma delta ADC. This allows me to receive signals with a very high dynamic range at relatively low power levels. The receiver has a digital baseband output and a bandwidth of approximately 300 kHz.
(soon)

Together with Andre Schwarzmeier I participated at the TI Analog Design Contest. The aim of our project was to use ultrasonic technology for wind speed measurement. The work has been rated for the first place.
(soon)

My Jugend Forscht project I was constructing several years ago. It is a ball shaped fully directional movable and remote controlable robot.
more...

In this year I was building an automatic weatherstation that had a browser based interface, i.e. could be read out from anywhere in the internet. Sensors included windspeed and direction, as well as temperature, air pressure and humidity.
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In this project I have built a bidirectional laserlink with speeds up to 115.2 kBaud/s using off the shelf laserpointers. The largest distance I've been testing with was 50 meters (whole the exhibition hall). In practice much more should be possible.