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:
Aug. 25, 2009
Filed:
Mar. 29, 2007
Applicants:
Taizou Tatsumi, Yamanashi, JP;
Sosaku Sawada, Yamanashi, JP;
Inventors:
Taizou Tatsumi, Yamanashi, JP;
Sosaku Sawada, Yamanashi, JP;
Assignee:
Eudyna Devices Inc., Yamanashi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electronic circuit includes: a control circuit that controls the gain of a transimpedance amplifier by taking part of an input current to be input to the transimpedance amplifier, based on the output voltage of the transimpedance amplifier; and a PIN diode that is provided between an input of the transimpedance amplifier and the control circuit, and is connected in the forward direction with respect to the current to be drawn into the control circuit.