For proper energy simulation of our GPU, we're going to need some good transistor models. For some circuits, we can do SPICE simulations of carefully-crafted circuits in order to do a better job of calculating energy than a gate-level sim in Cadence. This is also vitally important if we want to design GPUs to contain sensors that measure things like temperature, current, voltage, and delay.
I'm not an electrical engineer or a physicist. Sure, I know how to use SPICE, and I know how MOSFETs work at a general level, but I've got no clue about how to construct a proper model of a modern high-performance transistor. My colleagues tell me I need better transistor models, but no one seems to know where to FIND one. Apparently, researchers at many universities have models (they're called "cards" in SPICE) that are given to them by fabs, but under non-disclosure. I don't need one that specific, however. Just something about right for certain geometries. The best I've been able to find is this: http://ptm.asu.edu The problem that sticks out, however, is that the threshold voltages are all wrong, because these are ultra low-power transistors. I need high-performance transistors that typically have Vth around 200mV. Anyone know where I can get started with this? If not, I'm going to have to do an ask slashdot. :) -- Timothy Normand Miller, PhD Assistant Professor of Computer Science, Binghamton University http://www.cs.binghamton.edu/~millerti/ Open Graphics Project
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