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Magnet-field measuring device with a galvanomagnetic resistance probe

阅读:895发布:2022-05-17

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1. A DEVICE FOR MEASURING MAGNETIC FIELDS COMPRISING A GALVANOMAGNETIC RESISTOR FOR RESPONSE TO THE FIELD TO BE MEASURED, CURRENT SUPPLY MEANS CONNECTED TO SAID RESISTOR FOR PASSING CURRENT THERETHROUGH DURING MEASURING OPERATION, MAGNETIC MEANS FOR SUPERIMPOSING AN AUXILIARY MAGNETIC FIELD UPON SAID RESISTOR, ALTERNATINGCURRENT SUPPLY MEANS CONNECTED WITH SAID MAGNETIC MEANS FOR PRODUCING SAID AUXILIARY FIELD AT A HIGH FREQUENCY COMPARED WITH THE CHANGES OF THE FIELD TO BE MEASURED, MEASURING MEANS, AND A FILTERING CIRCUIT CONNECTING SAID MEASURING MEANS TO SAID GALVANOMAGNETIC RESISTANCE FOR CONTROLLING SAID MEASURING MEANS SUBSTANTIALLY ONLY IN RESPONSE TO VOLTAGE CHANGES CAUSED ALONG SAID RESISTOR BY SAID MEASURING FIELD.
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