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A methodology is presented that allows quantitative prediction of the impact of WLCSP induced mechanical stress on high precision mixed-signal ICs. The simulation flow was tuned using high-resolution experimental variability data measured on dedicated test chips. The methodology is exemplified with an on-chip oscillator circuit suffering from WLCSP stress induced variability.
Compact Thermal Models (CTMs) are now in use for more than 10 years. We have come a long way since the first introduction of the CTMs half way the nineties [1] [2]. This paper will give an overview of problems that still existed from the moment CTMs were introduced, how they were solved, and what must be done to make better use of this technology
The GLUCOS buoy-based observing system was deployed in Lake Michigan off the coasts of Milwaukee and Shorewood, WI from April 8 to May 28, 2009 to measure the dynamics of spring stratification. Three radio-linked data acquisition Pioneer buoys were deployed at 20 m, 40 m and 60 m depths approximately 2.1 km, 6.1 km and 9.2 km from shore respectively. Each buoy was equipped with a temperature sensor...
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