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Patent Searching and Data


Title:
CIRCUIT AND METHOD FOR TEMPERATURE DETECTION
Document Type and Number:
Japanese Patent JP2003004547
Kind Code:
A
Abstract:

To provide a device and a method capable of detecting temperature precisely.

An illustrative embodiment of this invention has a first oscillator circuit which generates a first signal having a frequency depending on a temperature detected. A differential circuit determines the difference in frequencies between the first signal and a second signal having a frequency which is substantially independent of the temperature, and generates a differential signal having a pulse number based on the difference. A counter circuit, in response to this differential circuit, offsets a predetermined temperature level based on the pulse appeared on the differential signal in order to gain an output signal representing a temperature detected.


Inventors:
Yin, Rong
Application Number:
JP2002000159882
Publication Date:
January 08, 2003
Filing Date:
May 31, 2002
Export Citation:
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Assignee:
STMICROELECTRONICS INC
International Classes:
G01K7/20; G01K15/00; (IPC1-7): G01K7/20
Attorney, Agent or Firm:
小橋 正明