| 摘要 |
<p>Provided is a magnetic field detection circuit capable of obtaining a stable zero-setting with a low current consumption. A magnetic field is detected by providing a magnetism detection element in which a coil (2) is wound around or placed close to a magnetic material (1), with a means for applying, to two ends of the magnetic material (1), a high-frequency pulse generated by an oscillator (3) and a pulse delayed from the high-frequency pulse by a predetermined time, thereby intermittently supplying an electric current (Im) in the plus and minus directions, and a means for detecting magnetic flux changes in the magnetic material (1), which correspond to the rising and falling edges of the delayed pulse, by using the coil (2).</p> |
