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Title:
WAVEFORM GENERATOR ELECTRONICS BASED ON TUNED LC CIRCUITS
Document Type and Number:
WIPO Patent Application WO2004029604
Kind Code:
A3
Abstract:
Disclosed is an apparatus for generating a periodically varying electrical signal for creating a periodically varying electrical field between electrodes of an ion mobility spectrometer. The apparatus includes an output port. A first tuned circuit is provided for being electrically coupled to an external power source and for, in isolation, providing a first periodically varying electrical signal having a first frequency. The first tuned circuit is coupled to the output port for providing an output electrical signal having a component at the first frequency thereto. A second tuned circuit is provided for being electrically coupled to an external power source and for providing a second periodically varying electrical signal having a second frequency different from the first frequency. The second tuned circuit is coupled to the first tuned circuit for varying the output electrical signal about the first periodically varying electrical signal.

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Inventors:
POTVIN LUCIEN (CA)
BARIBEAU YVES (CA)
Application Number:
PCT/CA2003/001444
Publication Date:
July 15, 2004
Filing Date:
September 23, 2003
Export Citation:
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Assignee:
IONALYTICS CORP (CA)
POTVIN LUCIEN (CA)
BARIBEAU YVES (CA)
International Classes:
G01N27/64; H01J49/42; (IPC1-7): G01N27/64; H01J49/02
Foreign References:
US5801379A1998-09-01
Other References:
PURVES R W ET AL: "MASS SPECTROMETRIC CHARACTERIZATION OF A HIGH-FIELD ASYMMETRIC WAVEFORM ION MOBILITY SPECTROMETER", REVIEW OF SCIENTIFIC INSTRUMENTS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 69, no. 12, December 1998 (1998-12-01), pages 4094 - 4105, XP000918121, ISSN: 0034-6748
GUEVREMONT R ET AL: "ATMOSPHERIC PRESSURE ION FOCUSING IN A HIGH-FIELD ASYMMETRIC WAVEFORM ION MOBILITY SPECTROMETER", REVIEW OF SCIENTIFIC INSTRUMENTS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 70, no. 2, February 1999 (1999-02-01), pages 1370 - 1383, XP000875375, ISSN: 0034-6748
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