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US 2002/0154517 A1Published application
Driving a quadrapole mass spectrometer via an isolating stage
AssigneeCalifornia Institute of Technology
InventorsAra Chutjian, Dean Aalami, Murray Darrach, Otto Orient
Life of this patent
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Abstract
Driving a quadrapole mass spectrometer includes obtaining an air core transformer with a primary and a secondary, matching the secondary to the mass spectrometer, and driving the primary based on first and second voltage levels. Driving of the primary is via an isolating stage that minimizes low level drive signal coupling.
Claims3
A method of driving an air core transformer having a primary and a secondary, the method comprising:
- splitting a high-frequency output into a plurality of out-of-phase voltage signals;
- applying each of the out-of-phase voltage signals to respective transistors to produce an oscillating signal, wherein a negative voltage is applied to the transistors to increase a peak value of the signals seen by the respective transistors;
- and
- applying the oscillating signal to the primary.
1 more element
Dependencies are inferred from the claim text.