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Research in high performance computing (HPC) energy optimization is a growing field motivated by cost and environmental drivers. As commodity server platforms are increasingly deployed as affordably scalable compute clusters, the processor and operating system's energy management capabilities also continues to advance in sophistication. This trend creates a large number of configuration and control...
The paper presents measured radiated emissions of an electronic module in the frequency range 150 kHz–200 MHz using the TEM cell method. The TEM cell measurement method is explained and measurement results for different orientations of the electronic module are presented. An explanation for the differences in the measured radiated emissions for different module orientations is given.
Aeroplane design is defined by many objectives. One of them is the reduction of weight while maintaining safety, functions and performance. As power measurement campaigns have revealed, weight can be saved, as the electrical system exhibits low capacity utilisation. This is, as there are many requirements (on certification, safety and function) to meet. Also, there are systems, which do not exhibit...
An on-chip buck converter with 3D chip stacking is proposed and the operation is experimentally verified. The manufactured converter achieves a maximum power efficiency of 62% for an output current of 70mA with a switching frequency of 200MHz and a 2x2mm on-chip LC output filter in 0.35mum CMOS. The use of glass epoxy interposer to increase the maximum power efficiency up to 71.3%, and the power efficiency...
While the CMOS analog circuits can be designed with the minimum-gate-length of the fabrication process in the alpha-power law MOSFET model, the length of a MOSFET gate has been chosen to be a larger scale than the minimum-gate-length in the conventional Shockleypsilas square model. In this paper, we describe a 6-b 100 MSPS CMOS current steering digital-to-analog converter (DAC) with the alpha-power...
A circuit for on-chip measurement of long-term jitter, period jitter, and clock skew, is demonstrated. The circuit uses a single latch and a voltage-controlled delay element, and is evaluated in a stand-alone pad frame. Excellent reproduction of jitter measured by oscilloscope is shown. Measured jitter resolution is 1 ps or better. The circuit is also incorporated into a 2 GHz clock distribution network...
In this paper, the method of Spatial Fourier Transform has been used to investigate the pattern formation dynamics in a dielectric barrier discharge (DBD) system. With this method, patterns formed in the DBD system can be transformed into smooth frequency spectrum. The frequency constitution of discharge pattern can be analyzed. In our experiment mixed gas of 96% Ar and 4% air at 0.9 atm is used as...
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