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:
May. 24, 2011
Filed:
Jan. 28, 2008
Applicant:
Shuzo Hiraide, Tokyo, JP;
Inventor:
Shuzo Hiraide, Tokyo, JP;
Assignee:
Olympus Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J 1/44 (2006.01); H03F 3/08 (2006.01); H01L 27/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A photoelectric current integrating circuit including: a first operational amplifier with a switch and an integrating capacitor connected in parallel between an input terminal and an output terminal thereof; a photodiode; and a current passing circuit provided between one terminal of the photodiode and the input terminal of the first operational amplifier, for passing a photoelectric current detected at the photodiode while blocking a connection between a parasitic capacitance of the photodiode and the integrating capacitor.