18704684. MASS SPECTROMETER (SHIMADZU CORPORATION)
MASS SPECTROMETER
Organization Name
Inventor(s)
Shiro Mizutani of Kyoto-shi (JP)
MASS SPECTROMETER
This abstract first appeared for US patent application 18704684 titled 'MASS SPECTROMETER
Original Abstract Submitted
A mass spectrometer includes a mass filter, a wave-detection unit, a cancellation circuit and a power supply device. The mass filter selects ions having a mass-to-charge ratio corresponding to an applied AC voltage. The wave-detection unit has a plurality of rectifiers each of which includes a rectifying device and which are connected in parallel, and detects the AC voltage applied to the mass filter as a wave-detection voltage. The cancellation circuit cancels an offset of the AC voltage caused by a leakage current of the rectifying device. The power supply device applies the AC voltage the offset of which has been canceled by the cancellation circuit to the mass filter based on the wave-detection voltage.