| 摘要 |
<p>PURPOSE:To obtain an effective value level detector which is inexpensive and smaller with a higher accuracy eliminating the need for a costly effective value detection circuit by obtaining an output proportional to a square of a magnetic flux using two Hall elements to determine a means thereof and detect the level thereof. CONSTITUTION:This apparatus is provided with a core 2 having a gap, a main circuit conductor/which is provided inside the core 2 to let current flow therethrough and first and second Hall elements 11 and 12 provided in the gap. This is further provided with a means to supply a control current proportional to a Hall output voltage of the first Hall element 11 and a means to detect the level of a mean signal of the Hall output voltage of the second Hall element 12.</p> |
