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. 03, 2013
Filed:
Nov. 01, 2011
Tatsuyuki Maki, Atsugi, JP;
Tatsuyuki Maki, Atsugi, JP;
Anritsu Corporation, Kanagawa, JP;
Abstract
There are provided a photodiode, an inverting amplifierwhich includes an operational amplifierand a first resistor, a second resistorwhich has a smaller resistance value than the first resistorand which is inserted between the positive side of a power supply and the photodiode, a differential amplifierwhich outputs a voltage across both ends of the second resistor, and a diodewhich is connected between a ground and a connection point between the photodiodeand an inverting input terminal of the operational amplifierand which changes to a non-conductive state when the inverting amplifieris not saturated and changes to a conductive state when the inverting amplifieris saturated so that the output current of the photodiodeis bypassed.