| 摘要 |
<p>PURPOSE:To achieve higher current measuring accuracy by setting an operating voltage to be applied to a magnetoresistance element above a specified value. CONSTITUTION:A magnetic field generating conductor 3 and a magnetoresistance element 2 are housed in a magnetic shield container 4 and an operating voltage to be applied to the element 2 is set above 15V to detect a current magnetic field which is generated by running a current (i) to the conductor 3. A resistance value of the element 2 is set above 2kOMEGA to reduce power consumption of the element 2. A noise is generated at a rising part and at a falling part in output characteristic of the element 2 with the operating voltage V being 7.5V or 3.7V while by setting the operating voltage V above 15V, an output waveform detected with the element 2 is eliminated and stabilized by a uniphase noise removing effect to the amplifier even when a current magnetic field is disturbed by an eddy current or the like thereby achieving higher current measuring accuracy.</p> |
