Title:
センサ装置
Document Type and Number:
Japanese Patent JP4127084
Kind Code:
B2
Abstract:
The present invention relates to a sensor apparatus capable of outputting an accurate sensor signal irrespective of a variation of power supply voltage. In the sensor apparatus, when an A/D conversion circuit produces and outputs digital data, a switch circuit is placed into a first switching condition so that a constant voltage is applied from a constant-voltage circuit to an oscillation circuit, and a stabilized oscillation frequency is outputted from the oscillation circuit to the A/D conversion circuit. Thus, even if a power supply voltage varies, the A/D conversion circuit carries out sampling processing on analog data on the basis of the stabilized oscillation frequency from the oscillation circuit to produce and output the digital data.
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Inventors:
Noboru Endo
Takao Tsuruhara
Takao Tsuruhara
Application Number:
JP2003066656A
Publication Date:
July 30, 2008
Filing Date:
March 12, 2003
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G01L9/00; G01D3/02; G01D3/028; G01D5/12; G01L19/08; G01R27/08; G01R33/02; H03L1/02; H03M1/00
Domestic Patent References:
| JP2003069430A | ||||
| JP11311559A | ||||
| JP63301625A | ||||
| JP11064135A | ||||
| JP5259907A | ||||
| JP2002107256A | ||||
| JP8210631A | ||||
| JP5028949U | ||||
| JP59142741U | ||||
| JP63171335A | ||||
| JP6232745A |
Attorney, Agent or Firm:
Tsuyoshi Sato
Kiyoshi Ogawa
Kiyoshi Ogawa