Patent ID: 6429726
Filing Date: 2002-08-06
Classification: G05F

Abstract:
An electrical system comprising:a functional unit block (FUB) including field effect transistors (FETs), each FET having source, drain, gate and bulk terminals; a central bias generator having a first voltage divider coupled between a power supply line and a power return line to provide a plurality of first dc voltages, switch circuitry having a plurality of inputs coupled to the voltage divider and a first output to provide a selected one of the first dc voltages, and a decoder having one or more outputs coupled to control the switch circuitry in response to an input code that represents a power supply voltage between the supply line and the return line; and a plurality of first local bias generators each being coupled to the first output to provide a first constant forward body bias (FBB), in response to the selected dc voltage, to each bulk terminal of at least some of the FETs.