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.
Patent No.:
Date of Patent:
Sep. 07, 1999
Filed:
Nov. 18, 1997
Applicant:
Inventors:
Yuji Takada, Kadoma, JP;
Teruki Hatatani, Kadoma, JP;
Toshio Fujimura, Kadoma, JP;
Shinji Sakamoto, Kadoma, JP;
Assignee:
Matsushita Electric Works, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
2503383 ;
Abstract
A pyroelectric infrared ray sensor is constituted with a current-voltage converting circuit utilizing an impedance of feedback capacity, obtained by adding the feedback capacity to an operational amplifier receiving as an input an element current from a pyroelectric element, whereby the current-voltage converting circuit can be improved in S/N ratio without altering characteristics of the pyroelectric element.