Magnetic coupler device and magnetically coupled isolator
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United States of America Patent
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Mar 19, 2013
Grant Date -
Jun 3, 2010
app pub date -
Jan 31, 2008
filing date -
Mar 12, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a magnetic coupler device comprising: a magnetic field generation circuit generating a magnetic field according to an input current; and a detection bridge circuit including a pair of magnetoresistance effect devices, a resistance value of each of the magnetoresistance effect devices changing by applying a magnetic field generated by said magnetic field generation circuit to each of the magnetoresistance effect devices, and having two outputs between which a voltage difference is generated according to an intensity of the magnetic field generated by said magnetic field generation circuit, by forming a geometric shape of each of said magnetic field generation circuit and said detection bridge circuit in line symmetric or point symmetric, a high S/N ratio is obtained even with high frequency.
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