Title:
ROTATION DETECTOR
Document Type and Number:
Japanese Patent JP3019185
Kind Code:
B2
Abstract:
PURPOSE: To prevent an abnormal pulse from being outputted at the time of turn ON/OFF power by providing a voltage detection means and means for blocking output of pulse when a detection value exceeds a set value.
CONSTITUTION: When the power supply voltage is in the range of 0-Vzz (Zener voltage of a constant voltage Zener diode 32), a comparator 31 is applied, at the (-) terminal thereof, with a voltage same as the power supply voltage and, at the (+) terminal thereof, with the power supply voltage divided by resistors 34, 35. Consequently, the comparator 31 outputs 0 voltage. When the power supply voltage exceeds Vzz, a constant voltage Vzz is applied to (-) terminal and the power supply voltage divided by the resistors 34, 35 is applied to the (+) terminal. When the voltage divided by the resistors 34, 35 is lower than Vzz, the comparator 31 outputs 0 to an AND circuit 41 otherwise outputs 1 thereto. When 0 is outputted from the comparator 31, the circuit 41 blocks passage of signal therefrom and when 1 is outputted from the comparator 13, the circuit 41 passes the signal therefrom.
Inventors:
Masaki Hirota
Application Number:
JP20680494A
Publication Date:
March 13, 2000
Filing Date:
August 31, 1994
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
G01P3/481; G01B7/00; G01D5/244; G01D5/245; (IPC1-7): G01D5/245; G01B7/00; G01P3/481
Domestic Patent References:
| JP868663A | ||||
| JP6147918A | ||||
| JP758704A |
Attorney, Agent or Firm:
Hiroshi Ochi (5 others)
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