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Engineering · Electrical Engineering
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(10 pts) A VLSI chip has a system cooling solution which has an effective thermal resistance of 2.5°C/W after taking into account the power density at the heat source. Maximum allowed junction temperature (T) is 110°C. The system operates in an air-conditioned room at 25 °C.VLSI chip unfortunately runs at a high 42.5 W when exercised using thermal design power workload. When design efforts and schedule opportunity costs are taken into account, it costs $500,000 to reduce the chip power by 0.5 W so it can operate within T, specs. On the other hand it costs $1,000,000 for each 0.1 °C/W reduction in cooling solution thermal resistance. 8. i. For cost minimization, do you think A- B- the system engineers should work on improving the cooling solution, or VLSI design engineers should work on reducing design power, in order to deliver this product without violating the specs? Show your quantitative analysis. What are the drawbacks (disadvantages) of your proposal in (i) ? ii.

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