Rajendran Nair

1.1 V 1 GHz communications router with on-chip body bias in 150 nm CMOS

A router chip, that incorporates on-chip forward body biasing capability with 2% area overhead, achieves 1 GHz operation at 1.1 V supply in a 150 nm logic technology, compared to 1.25 V required for the original design having no body bias. Switching power is 23% less and chip leakage is reduced by 3.5/spl times/ in standby mode by withdrawing forward bias.

Effectiveness of adaptive supply voltage and body bias for reducing impact of parameter variations in low power and high performance microprocessors

Test chip measurements show that adaptive V/sub CC/ is useful for reducing impacts of parameter variations on frequency, active power and leakage power of microprocessors. Using adaptive V/sub CC/ together with adaptive V/sub BS/ or WID-V/sub BS/ is much more effective than using any of them individually.