Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1998-02-13
1999-10-19
Ballato, Josie
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
324750, 3242441, 324753, G01R 3100
Patent
active
059695170
ABSTRACT:
A laser probe for measuring a magnetic field is disclosed. A polarized laser beam is passed through a magneto-optic crystal in the presence of an unknown magnetic field. The rotation of the polarization which occurs through the magneto-optic crystal is measured in order to determine the magnitude of the magnetic field. The measured magnetic field is used to determine, for example, the current through a conductor such as an interconnect line on a semiconductor chip. A method of calibrating the magnetic field using a known magnetic from a solenoid is also disclosed. Further disclosed is a method of providing a zero-reference current by momentarily stopping the chip clock.
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Ballato Josie
Intel Corporation
Kobert Russell M.
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