Title:
SENSOR CIRCUIT
Document Type and Number:
Japanese Patent JP3116201
Kind Code:
B2
Abstract:
PURPOSE: To reduce the circuit scale and reduce the erroneous operation due to noise, as for a sensor circuit.
CONSTITUTION: A sensor circuit is used for a sensor device which is installed at a gateway and carries out the specific information operation according to the passing of persons. When an infrared ray sensor 1a senses the approach of a person, a sensor part 1 generates an output. Receiving the output of the sensor part 1, an oscillation part 2 generates clock pulses. Receiving the output of the sensor part 1, a processing part 3 starts the generation of the special output for carrying out the information operation, and counts the starting-up of clock pulse, and when the count value reaches a prescribed value, output is suspended by the starting-down of the clock pulse. Accordingly, the circuit scale is reduced by using the clock pulse in one system, and the influence of noise can be reduced.
Inventors:
Haruhiko Otsuka
Hiroshi Shirasawa
Hiroshi Shirasawa
Application Number:
JP7405893A
Publication Date:
December 11, 2000
Filing Date:
March 31, 1993
Export Citation:
Assignee:
Seikosha Co., Ltd.
International Classes:
G01V8/12; (IPC1-7): G01V8/12
Domestic Patent References:
| JP540181A | ||||
| JP59194299U | ||||
| JP57168197U | ||||
| JP5895541U |
Attorney, Agent or Firm:
Kazuko Matsuda
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