Title:
SENSOR SIGNAL DETECTOR
Document Type and Number:
Japanese Patent JP3878157
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a sensor signal detector for improving the reliability of a sensor used for collateralizing safety or the like with respect to human bodies.
SOLUTION: The detector comprises an internal power voltage generation circuit 20, a buffer amplifier 21 for receiving signal from the sensor, a pull-up element 11 and a pull-down element 12 connected to its input terminal by way of a pair of switches 15 and 16, a gain amplifier 22 for receiving the output signal of the buffer amplifier 21, a pull-up element 13 and a pull-down element 14 connected to its input terminal by way of a pair of switches 17 and 18, and a troubleshooting circuit 10 for controlling the connection of the two pairs of switches 15 and 16, 17 and 18 in a specific turn and inspecting the internal power voltage generation circuit 20, a buffer amplifier 21 and the gain amplifier 22.
Inventors:
Umeki Nobuaki
Application Number:
JP2003271278A
Publication Date:
February 07, 2007
Filing Date:
July 07, 2003
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
E05F15/20; G01R31/00; B60J1/17; B60N2/00; G01V9/00; H03K17/94; H03K17/95; H03K17/955; H03K17/96; (IPC1-7): G01R31/00; E05F15/20
Domestic Patent References:
| JP2000231689A | ||||
| JP4078570U | ||||
| JP5004025U | ||||
| JP7151805A | ||||
| JP59213548A | ||||
| JP62039776A | ||||
| JP3033619A |
Attorney, Agent or Firm:
Tsuneo Fujikawa
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