Mam
Thank you for your answer.Normally in low-power mode the voltage swing will be in the range of 1.6v to 3.3v.
It depends on the application. If the application demands low leakage then the threshold voltage has to be kept high to reduce the sub-threshold current. High threshold voltage will create a low overdrive voltage yielding low gain.
If you are referring to Vth for transistors the simple and honest answer: you won't know. That is an Intel foundry secret and they wouldn't share this with you.
Can you extrapolate? Maybe. You can make a rough guesstimate (pay attention to how vague that is) based on ITRS roadmaps and VDD, Vth scaling trends. But that wouldn't yield to any scientificly useful information or experiment.
Dear Goby,
As a rule pf thumb the threshold voltage Vth is made about 0.2 VDD, with VDD the power supply voltage. Lower threshold voltage may cause excessive off current and higher stand by power consumption while higher threshold voltages will decrease the overdrive factor and consequently slowing the switching speed of the transistors.
Some systems are built with multiple threshold voltages and power supplies.
Best wishes
Mr. Zekry is correct. For a modern CMOS high-performance processor (PC or mobile phone, for example) Vth is about .2VDD and VDD is in the 1V - 1.2V range. The exact values are process dependent and often not public.
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