| 摘要 |
There is disclosed a Hall effect switching device involving the combination of a Hall effect device, a differential amplifier and a current control trigger circuit. The use of the differential amplifier in conjunction with the current control-trigger circuit amplifies the Hall effect voltage and permits the use of high hysteresis triggers. Control of the current control-trigger circuit is accomplished by a pair of current sources, the output of one of which is varied in response to the output of the differential amplifier. The trigger circuit is initially unbalanced in its OFF mode and is turned ON by the output of the amplifier reaching a predetermined high value. The trigger is turned OFF by the output of the differential amplifier returning to some specified low value.
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