Time-of-flight mass spectrometry utilizing finite impulse response filters to improve resolution and reduce noise
US6822227B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2003 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jul 28, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mass spectrometer having an ion accelerator and an ion detector utilizing a finite impulse response filter is disclosed. The ion accelerator generates an ion pulse in response to a start signal. A clock increments a register that indicates the time that has elapsed since the start signal. The ion detector is spatially separated from the ion accelerator and generates a measurement signal indicative of ions striking the detector. The measurement signal is filtered through a finite impulse response filter to form a filtered measurement signal. The finite impulse response filter has a filter function that depends on the impulse response of the ion detector. In one embodiment, the mass spectrometer includes a memory that is addressed by the register value and an adder. The adder forms the sum of the data value specified by the register value and the output value from the finite impulse response filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.