Patent ID: 7212033

Claim:
A level shifting device having an input side, an output side, and a level shifting circuit connecting the input side and the output side, wherein the input side comprises: an input circuit operating at a first voltage provided between a first supply bus and a first reference bus, the input circuit is adapted to receive an input signal referenced to the first voltage, and to provide an output; the level shifting circuit is connected to the output of the input circuit; and the output side operates at a second voltage provided between a second supply bus and a second reference bus, the second buses are separate and independent from the first buses, the output side includes: a first circuit having fully differential topology, and an output circuit which receives a fully differential input from the first circuit and provides a single-ended output referenced to the second voltage, wherein the first circuit is operative to sample signals corresponding to transitions of the input signals between first and second levels, hold signals corresponding to the values of the sampled signals between transitions, and supply the held values in differential form to the output circuit.