Integrated GMR isolation technique

An integrated isolation device has been realized which uses a magnetically sensitive Giant Magnetoresistive Ratio (GMR) resistor in conjunction with an isolated input current loop on the same die. This device has been demonstrated in an isolated current replicator circuit using conventional discrete components and packaged integrated GMR isolators that display >1500 V of isolation protection between input and output. Circuits made with this technique will for the first time allow multiple high voltage isolated inputs to be economically integrated with conventional VLSI circuitry