Substrate-noise and random-fluctuations reduction with self-adjusted forward body bias

We propose a method of reducing substrate noise and random fluctuations utilizing a self-adjusted forward body bias (SA-FBB) circuit. To achieve this, we designed a test chip that contained an on-chip oscilloscope for detecting dynamic noise from various frequency noise sources, and another test chip that contained 10-M transistors for measuring random fluctuation tendencies. Under SA-FBB conditions, it reduced noise by 69.8% and reduced random fluctuations /spl sigma/(I/sub ds/) by 57.9%.