| 摘要 |
<p>PCT No. PCT/EP96/01686 Sec. 371 Date Aug. 5, 1996 Sec. 102(e) Date Aug. 5, 1996 PCT Filed Apr. 23, 1996 PCT Pub. No. WO97/01222 PCT Pub. Date Jan. 9, 1994In order to make the commonly used approximation switch insensitive to intermittently occurring magnetic interference fields, such switch consisting of a magnetic field sensor (1) acting via an amplifier stage (2) on a switching stage (3), provision is made for a second sensor (4) reacting to such interference fields, said sensor, in its activated state, returning the given output signal of the switching stage (3) to the input of the amplifier stage (2) for maintaining the given lead signal of the sensor stage (magnetic field sensor 1), and thus preserving the functional state of the approximation switch present in the event of interference.</p> |
