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:
Dec. 09, 2014
Filed:
Feb. 10, 2011
Shiro Mizutani, Kyoto, JP;
Shiro Mizutani, Kyoto, JP;
Shimadzu Corporation, Kyoto-Shi, JP;
Abstract
A quadrupole power source which applies a voltage to each electrode (-) of a quadrupole mass filter () receives inputs of an m/z-axis correction coefficient Mcompand a V-voltage correction coefficient Vcompin addition to a power supply controlling voltage Qcont according to the m/z of a target ion. Vcompis a reciprocal of the ratio by which a frequency is changed, while Mcompis the square of the ratio by which the frequency is changed. In a detection gain adjuster section (C), a multiplier () multiplies an output Vdet' of a V-voltage adjusting amplifier () by Vcomp, whereby the radio-frequency voltage produced by a radio-frequency power supply section (A) is maintained at the same level even when the set frequency of a signal generator () is changed in order to tune an LC resonance circuit.