Patent ID: 6114875
Filing Date: 2000-09-05
Classification: H03K

Abstract:
A circuit for converting analogue levels of first logic signals of a first functional area of an integrated circuit, said first functional area being supplied from an electrical supply at a first voltage value, into second logic signals of a second functional area of said integrated circuit, said second functional area being supplied from an electrical supply at a second voltage value, less than or equal to said first voltage value, these values being defined with respect to a same reference voltage, wherein said circuit comprises, connected in succession in cascade with respect to said common reference voltage:converter means supplied at said first voltage value and receiving on an input terminal a logic input signal consisting of said first signals and whose analogue level is adapted to that of said first voltage value, said converter means delivering a replicated logic input signal and an inverted logic input signal, whose analogue level is adapted to that of said first voltage value, anddifferential converter means, supplied at said second voltage value and receiving said replicated logic input signal and said inverted logic signal, said differential converter means delivering a converted logic input signal in phase with said logic input signal and whose analogue level is adapted to that of said second voltage value, said converted logic input signal constituting said second logic signals.