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DVFS

gops
I know DVFS is a method to reduce power. But if I vary (reduce) the frequency of operation keeping Voltage constant , Can i achieve dynamic power reduction comparable to DVFS .
  • grasshopper

     Hi gops,

     

    DVFS stands for Dynamic Voltage Frequency Scaling. What you are proposing is varying the frequency without changing the volatge.That will certainly reap you some of the rewards but full DVFS will provide you better overall performance (power, timing, and ultimately area as well) To answer your question, you certainly achieve power reduction as you suggested. However you will not be able to achieve as much power reduction (or you will give up more performance) by locking the voltage. I suggest you take a look at the Common Power Format and what it would take to use DVFS since there is a pretty well established methodology to do DVFS using CPF. If it is any help, Si2 has a pretty detailed low power design manual which you can download for free (if I am not mistaken) if you are interested.

     

    hope this helps,

    gh-

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