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. 09, 2014
Filed:
Jun. 23, 2011
Kei Shinada, Uji, JP;
Shigeyoshi Horiike, Uji, JP;
Takahiro Nishimoto, Soraku-gun, JP;
Katsuhisa Kitano, Ibaraki, JP;
Kei Shinada, Uji, JP;
Shigeyoshi Horiike, Uji, JP;
Takahiro Nishimoto, Soraku-gun, JP;
Katsuhisa Kitano, Ibaraki, JP;
Shimadzu Corporation, Kyoto-Shi, JP;
Osaka University, Osaka, JP;
Abstract
A technique for reducing an electromagnetic noise entering an electrode or a drift of a signal due to a fluctuation in the ambient temperature is provided to improve the S/N ratio of a signal originating from a component of interest. A dummy electrode having the same structure as an ion-collecting electrode is provided within a lower gas passage at a position where dilution gas with no sample gas mixed therein flows. A differential amplifier is provided to perform differential detection between output A of a current amplifier connected to the ion-collecting electrode and output B of a current amplifier connected to the dummy electrode. The differential signal is free from a common mode noise or drift and hence accurately reflects the amount of the component of interest.