US 9,437,409 B2Granted

High voltage power supply filter for a mass spectrometer

AssigneeDH Technologies Development Pte. Ltd.

InventorsJohn Vandermey, Alexander Tsipirovich

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Abstract

Systems, devices, circuits, and methods are provided for an improved mass spectrometry detection system that comprises at least one component that operates at a high voltage. A number of high voltage filters or circuits are provided for reducing noise from high voltage power supplies that produce positive and negative voltages. In some embodiments, the filters can comprise one or more diodes. In some embodiments, the filters can comprise one or more transistors. In some embodiments, the filters can comprise one or more transistor pairs. A variety of embodiments of systems, devices, circuits, and methods in conjunction with the disclosures are provided.

Claims10

Dependent claims

A circuit for use with a high voltage power supply of a mass spectrometer system, comprising:

a high voltage input;
a high voltage output;
a low pass filter coupled between the high voltage input and the high voltage output and configured to prevent frequencies higher than a threshold frequency from passing to the high voltage output;
and
at least two transistors coupled between the high voltage input and the high voltage output, the at least two transistors being electrically coupled in parallel and each comprising an emitter follower transistor and wherein the at least two transistors are positioned downstream of the low pass filter and configured to filter noise from a voltage outputted by the high voltage input before the voltage arrives at the high voltage output;
and wherein a collector lead of each of the at least two transistors is electrically connected to the high voltage input and a base lead of each of the at least two transistors is electrically connected to the low pass filter.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/367,229Filed 6 Dec 2012 · us provisional application
Priority: 27 Dec 2011
Published: US 2015/0187552 A12 Jul 2015
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H01J 49/022
Details: circuit arrangements, e.g. for generating deviation currents or voltages ; Components associated with high voltage supply
G05F 3/16
Using uncontrolled devices with non-linear characteristics: being semiconductor devices
H01J 49/025
Details: detectors specially adapted to particle spectrometers
H01J 49/067
Electron- or ion-optical arrangements: ion lenses, apertures, skimmers

Family

Application61/580,418Us provisional application · filed 27 Dec 2011
US 2015/0187552 A1Pre-grant publication · published 2 Jul 2015
US 9,437,409 B2This patent

From the US filing history. Foreign family members aren’t listed.

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