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Patent Searching and Data


Title:
TEMPERATURE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/001737
Kind Code:
A1
Abstract:
Provided is a high-accuracy temperature detection device. A D/A conversion circuit is constituted by a ladder network (23), constant current circuits (CC0-CC3), and switch circuits (SW0-SW3). The switch circuits (SW0-SW3) are switched in accordance with adjusted data values determined in advance such that the temperature detection value (Vt) is within a prescribed range, and a diode or other temperature-sensitive circuit is held at a threshold temperature for overheat protection operation. When interrupting a connection between a constant current circuit (CC0-CC3) and a current terminal (N0-N3), each switch circuit (SW0-SW3) connects the constant current circuit in question to a common terminal (Nc), whereby the voltage flowing to the temperature-sensitive circuit is constant irrespective of the adjusted data values, and the correction resolution (∆V) of the temperature detection value (Vt) is constant.

Inventors:
KOBAYASHI, Atsushi (C/O DENSO CORPORATION, 1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2014/003221
Publication Date:
January 08, 2015
Filing Date:
June 17, 2014
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
G01K7/00; G01K7/01; G01K15/00
Foreign References:
JP2006344721A2006-12-21
JP2008249374A2008-10-16
JP2011109592A2011-06-02
JP2001013011A2001-01-19
JP2004108987A2004-04-08
JPH09172374A1997-06-30
JPH0829269A1996-02-02
Attorney, Agent or Firm:
KIN, Junhi (6th Floor, Takisada Bldg. 2-13-19, Nishiki, Naka-ku, Nagoya-cit, Aichi 03, 〒4600003, JP)
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