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Power supply

A power supply, supply voltage technology, applied in instruments, circuits, discharge tubes, etc., can solve problems such as affecting stability

Active Publication Date: 2021-07-27
THERMO FISHER SCI BREMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, the technique used to derive an accurate reference voltage from an accurate voltage will affect its stability

Method used

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Embodiment Construction

[0159] figure 1 A first embodiment of an inventive power supply 2 is shown. The main elements of the power supply 2, which are essential to the invention, are shown schematically.

[0160] The power supply 2 of the present invention includes two different DC voltage sources, an ultra-stable DC voltage source 4 (V1) and a precise DC voltage source 6 (V2).

[0161] The ultra-stable DC voltage source 4 can provide a very stable output voltage. The stability of the output voltage is guaranteed within a certain time and a certain temperature range. The voltage stability value of the output voltage of the DC ultra-stable voltage source 4 is usually lower than 5ppm, preferably lower than 1ppm, more preferably lower than 0.5ppm, particularly preferably lower than 0.3ppm. The stability of the output voltage is generally more than 12 hours, preferably more than 24 hours, more preferably more than 48 hours, particularly preferably more than 96 hours. The stability of the output volta...

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Abstract

A power supply and a method for calibrating a power supply. The power supply is configured to provide a reference voltage to provide a voltage to the at least one electrode. The power supply comprises a super-stable direct-current voltage source, a precise direct-current voltage source, a tuning unit, a comparator and a control unit. An ultra-stable voltage is applied to the tuning unit, the ultra-stable voltage being provided based on a supply voltage of the ultra-stable DC voltage source. The tuning unit provides an output voltage. The comparator compares a voltage based on an output voltage of the tuning unit with the precise voltage. The precise voltage is provided based on a supply voltage of the precise DC voltage source. The comparator supplies a signal generated from the comparison to the control unit, where the control unit tunes the tuning unit during tuning according to the signal supplied by the comparator to minimize an absolute difference between a voltage based on an output voltage of the tuning unit and the accurate voltage. A reference voltage of the power supply is provided based on an output voltage of the tuning unit after the tuning period.

Description

technical field [0001] The invention relates to a power supply for providing a reference voltage. This reference voltage is used to provide a voltage to at least one electrode. Background technique [0002] In a mass spectrometer, ions are transported and analyzed through charged electrodes. A DC voltage and / or a RF voltage is applied to these electrodes. [0003] The performance of a mass spectrometer often depends on the stability and / or precision of the applied voltage. This stability and / or accuracy can be achieved by a voltage source, power supply, or reference voltage; where the reference voltage is provided by the voltage supply and then amplified by a voltage amplifier to the voltage to be applied to the electrodes. [0004] Stability and precision requirements regarding the applied voltage depend on the function of the electrodes in the mass spectrometer. [0005] The voltage provided by the DC voltage source for certain functions in the mass spectrometer should...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/561H01J49/022H03G3/30G05F1/468G05F1/461H01J49/26H01J49/40H01J49/4245H01J49/406G05F5/00
Inventor P·科赫姆斯
Owner THERMO FISHER SCI BREMEN
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