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Technology scaling behavior of optimum reverse body bias for standby leakage power reduction in CMOS IC's

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6 Author(s)
A. Keshavarzi ; MicroComput. Res. Lab., Intel Corp., Hillsboro, OR, USA ; S. Narendra ; S. Borkar ; C. Hawkins
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We demonstrate that, there is an optimum reverse body bias, unique to any technology generation, that minimizes the standby leakage power consumption of an IC design implemented in that technology. We also show: (1) the optimum reverse body bias value reduces by /spl sim/2X per technology generation, and (2) the maximum achievable leakage power reduction by reverse body biasing diminishes by /spl sim/4X per generation under constant field technology scaling scenario. Optimum point occurs as a result of reduction in subthreshold leakage and an increase injunction band-to-band tunneling leakage with applied reverse bias. Therefore, new junction engineering techniques to reduce the bulk band-to-band tunneling leakage current component across the junction are needed to preserve the effectiveness of reverse body biasing for standby leakage control in future technologies.

Published in:

Low Power Electronics and Design, 1999. Proceedings. 1999 International Symposium on

Date of Conference:

17-17 Aug. 1999