| 摘要 |
PURPOSE:To secure the actuation of the titled switch circuit at a set position regardless of the working direction of the magnetic force, by providing a non- reverse comparator and a reverse comparator at the output terminal of a reverse amplifier to which the output of a Hall device is applied. CONSTITUTION:A Hall device 1 is connected to a reverse amplifier 7 having a plus terminal set at the reference voltage E2. The output of the amplifier 7 is connected to a plus terminal of a non-reverse comparator 8 as well as a minus terminal of the comparator 8. Then the minus terminal of the comparator 8 is set at the reference voltage E3 higher than the voltage E2 by a certain amount. While a plus terminal of a comparator 9 is set at the reference voltage E4 lower than the E2 by a certain level. The outputs of both comparators 8 and 9 are connected to an output terminal F via diodes D1 and D2 respectively. As a result, a magnetic proximity switch circuit can work at a set position regardless of the working direction of the magnetic force.
|
