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Using Keeper Control and Body Bias for Fine Grained Threshold Voltage Compensation in Dynamic Logic

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2 Author(s)
Azizi, N. ; Univ. of Toronto, Toronto ; Najm, F.N.

We propose a novel fine-grained scheme to compensate for within-die variations in dynamic logic to reduce the variation in leakage, delay and noise margin using both keeper control and body-biasing. We first show that the amount of compensation needed depends on the correlation that exists between gates, and then analytically show the possible reduction in the variance of the leakage and delay of both a single and multiple dynamic logic gates. We then design circuits to implement the system which provides the reduction in the variance of the leakage, delay and noise margin of dynamic logic gates and show that it produces a close match to the analytical results. In one design the variance of the leakage of 169 gates is reduced by 27% and the variance of the path delay is reduced by 39%.

Published in:

Electrical and Computer Engineering, 2007. CCECE 2007. Canadian Conference on

Date of Conference:

22-26 April 2007

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