Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
TEMPERATURE DETECTION CIRCUIT, TEMPERATURE DETECTOR, AND PHOTOELECTRIC CONVERTER
Document Type and Number:
Japanese Patent JP2005265521
Kind Code:
A
Abstract:

To provide a temperature detection circuit for detecting temperatures with a high temperature coefficient even with a low power supply voltage, a temperature detector using such a temperature detection circuit, and a photoelectric converter for providing a sensor signal stable with respect to temperatures based on temperature information acquired by using such a temperature detector.

This temperature detection circuit comprises a first current source 101 for outputting a current proportional to absolute temperature as a first current, a second current source 103 for outputting a current substantially constant with respect to temperature as a second current, a current mirror circuit 104 into which the first and second currents are inputted for outputting a current proportional to a difference between the first and second currents as a third current, and a readout circuit 105 for converting the third current into a voltage.


Inventors:
FUKUNAGA YASUHIRO
Application Number:
JP2004075967A
Publication Date:
September 29, 2005
Filing Date:
March 17, 2004
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
OLYMPUS CORP
International Classes:
G01K7/01; G03B7/22; G03B7/28; H03F1/30; H03F3/343; (IPC1-7): G01K7/01; G03B7/22; G03B7/28; H03F1/30; H03F3/343
Domestic Patent References:
JPH114119A1999-01-06
JP2000076797A2000-03-14
JPH11506541A1999-06-08
JPH09184768A1997-07-15
JP2002108467A2002-04-10
JPH08234853A1996-09-13
JPH10332494A1998-12-18
JP2000146711A2000-05-26
JPS6365894B21988-12-19
JP2002368557A2002-12-20
JP2913428B21999-06-28
JPH11305112A1999-11-05
Foreign References:
WO2001042752A12001-06-14
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Sadao Muramatsu
Tetsuya Kazama