G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 33/09 (2006.01) H01L 43/00 (2006.01) H01L 43/08 (2006.01) H01P 1/36 (2006.01)
Patent
CA 2473547
An integrated signal isolator is provided to isolate first and second circuits. First, second, third, and fourth magnetoresistors of the isolator are coupled together so as to form a Wheatstone bridge. The first second, third, and fourth magnetoresistors are arranged so that the Wheatstone bridge is immune to uniform external magnetic fields having any direction. An input strap generates magnetic fields across the first, second, third and fourth magnetoresistors in response to a signal from the first circuit so that the Wheatstone bridge provides an output to the second circuit that is commensurate with the signal from the first circuit.
La présente invention concerne un isolateur de signal intégré capable d'isoler de premiers et seconds circuits. En l'occurrence, l'isolateur comporte quatre magnétorésistances montées en pont de Wheatstone de façon à présenter une immunité à des champs magnétiques externes uniformes quelles que soient leurs orientations. Ainsi, un étrier d'entrée crée des champs magnétiques entre les quatre magnétorésistances en réaction à un signal du premier circuit de façon que le pont de Wheatstone délivre au second circuit une sortie en proportion du signal du premier circuit.
Gowling Lafleur Henderson Llp
Honeywell International Inc.
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