The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Dec. 18, 2007

Filed:

Oct. 18, 2004
Applicants:

Kok-soon Yeo, Singapore, SG;

Lian-chun Xu, Singapore, SG;

Chee-keong Teo, Singapore, SG;

John Julius DE Leon Asuncion, Singapore, SG;

Inventors:

Kok-Soon Yeo, Singapore, SG;

Lian-Chun Xu, Singapore, SG;

Chee-Keong Teo, Singapore, SG;

John Julius De Leon Asuncion, Singapore, SG;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 5/00 (2006.01); H01B 10/02 (2006.01);
U.S. Cl.
CPC ...
Abstract

In one embodiment, an optical transducer, such as an infrared transducer, generates an output signal that is representative of optical irradiance. A noise control circuit is coupled in a power supply path of the optical transducer. A switching circuit varies the noise control provided by the noise control circuit, in response to changes in the output signal of the optical transducer. The noise control may be varied in a number of different ways, including: turning the noise control on or off, varying the noise control in discrete steps, or varying the noise control in a continuous manner. Methods for varying noise control in response to optical irradiance of an optical transducer are also disclosed.


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