| 摘要 |
a magneto- sensing body (11) formed by an amorphous wire conducting a pulse current; a detection coil (12) wound around the magneto-sensing body (11); and a sample hold circuit for detecting voltage induced in the detection coil (12) when the pulse current is cut off. The sample hold circuit has: a sample hold section (B31) consisting of an electronic switch (S31), a capacitor (C32), a resistor (R32), a resistor (R33), and a high-input resistance amplifier (A31); and a delay circuit having a resistor (R31) and a capacitor (C31) connected to the control terminal of the electronic switch (S31).
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