Device for supplying voltage to the cathode of a mass spectrometer
AssigneeInficon GmbH
InventorNorbert Rolff
Life of this patent
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Abstract
A simplified device for voltage supply of the cathode of a mass spectrometer comprises a push-pull transformer, wherein, apart from the normal rectifier diodes (7, 9), a controlled rectifier (8, 10) is provided. The gate of the first transistor (8) is connected to the second output (30), and the gate of the second transistor (10) is connected to the first output (32) of the transformer. A voltage supply device, consisting of at least one voltage multiplier, is connected via capacitors (13, 14, 15) to the output of the transformer and feeds, amongst others, the emission current measurement device.
Claims10
A device for voltage supply of the cathode of a mass spectrometer, said device comprising
- a transformer supplied by an input voltage, said transformer having at least one first output and/or a second output and an output-side intermediate connector,
- at least one two diodes being connected, via their mutually corresponding connectors, i.e. the cathodes or the anodes, to different ones of the outputs of the transformer, the connector of the first diode being connected to the first output and the connector of the second diode being connected to the second output, and there being provided, for each diode, a first and respectively second transistor connected parallel to the respective diode, and the source connector of each transistor being connected to that connector of the corresponding diode which is arranged opposite to the transformer,
- wherein the gate of the first transistor is connected to the second output and the gate of the second transistor is connected to the first output of the transformer.
Dependencies are inferred from the claim text.