Substrate noise influence on circuit performance in variable threshold-voltage scheme

- This paper investigates substrate noise influence on circuit performance in a variable thresholdvoltage scheme (VT scheme) where threshold voltage is dynamically varied by substrate-bias control to reduce active power dissipation. It is experimentally examined that substrate-bias can be controlled stably with very few substrate-contacts. Measured tracking jitter of a delaylocked loop implemented by interconnections in an 8mmsquare gate array does not degrade even when substratecontacts are removed except for one at every strip of p-sub and n-well. A 2mm-square discrete cosine transform core processor with no substrate-contact except in its

• Type: Conference
• Year: 1996
• Where: ISLPED
• Authors: Tadahiro Kuroda, Tetsuya Fujita, Shinji Mita, Toshiaki Mori, Kenji Matsuo, Masakazu Kakumu, Takayasu Sakurai
• Keywords: Active Power Dissipation, Hardware, ISLPED 1996, Substrate Noise Influence, Variable Thresholdvoltage Scheme