Patent ID: 6556047
Filing Date: 2003-04-29
Classification: H03K

Abstract:
A circuit for shifting at least one input switching signal and comprising:a CMOS bistable circuit having two branches, each branch being connected between a first voltage reference and a second voltage reference and comprising a MOS input transistor having a first type of conductivity and comprising a drain, a MOS output transistor having a second type of conductivity and comprising a drain and a gate, and at least one MOS voltage clamping transistor connected between said input transistor and said output transistor, the drain of said output transistor of each branch connected to the gate of said output transistor of the other branch, and the drain being connected to the drain of said input transistor of a same branch through said at least one voltage clamping transistor; and an acceleration circuit for accelerating switching of said bistable circuit for allowing said output transistor of each branch to be switched to an off state when said input transistor of a same branch switches to an on state, said acceleration circuit comprising, for at least one branch, a current mirror for generating a turn-off current for said output transistor based upon a turn-on current for said input transistor.