Patent ID: 8570096
Filing Date: 2013-10-29
Classification: G05F,H03K

Abstract:
1. A dynamic biasing circuit for a substrate of a metal oxide semiconductor (MOS) power transistor to be coupled to power an electronic function block on or off, the MOS power transistor comprising an intrinsic source-substrate diode, the dynamic biasing circuit comprising: a current source; a first switch configured to couple the substrate to said current source so that the intrinsic source-substrate diode is forward biased when a gate voltage of the MOS power transistor turns the MOS power transistor on; said current source comprising a stack of diodes between the substrate and a supply voltage and having a same conduction direction as the intrinsic source-substrate diode; and interrupt circuitry configured to interrupt current in said stack of diodes when the electronic function block is inactive based upon an associated output signal and when the MOS power transistor is on.