DRIVING CIRCUIT FOR MAGNETIC IMPEDANCE EFFECT ELEMENT

DRIVING CIRCUIT FOR MAGNETIC IMPEDANCE EFFECT ELEMENT

PROBLEM TO BE SOLVED: To realize a magnetic impedance effect element for which winding an exciting coil can be simplified in work and structure by reducing the exciting coil and which can be power-saving. SOLUTION: The circuit has a differential amplifier 7c for differentially amplifying a voltage a...

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Hauptverfasser: SASAGAWA SHINICHI, SUDOU YOSHIHIRO, OUCHI JUNICHI
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator SASAGAWA SHINICHI
SUDOU YOSHIHIRO
OUCHI JUNICHI
description PROBLEM TO BE SOLVED: To realize a magnetic impedance effect element for which winding an exciting coil can be simplified in work and structure by reducing the exciting coil and which can be power-saving. SOLUTION: The circuit has a differential amplifier 7c for differentially amplifying a voltage appearing to a first magnetic impedance effect element 4 and a voltage appearing to a second magnetic impedance effect element 6, and an exciting coil 10 for negative feedback which applies a negative feedback magnetic field to the first magnetic impedance effect element 4 and second magnetic impedance effect element 6. The exciting coil 10 for negative feedback is biased with an equal voltage to a central value of an output voltage of the differential amplifier 7c, and a feedback current is sent from the output side of the differential amplifier 7c to the exciting coil 10 for negative feedback.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title DRIVING CIRCUIT FOR MAGNETIC IMPEDANCE EFFECT ELEMENT
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