FAIMS apparatus and method for separating ions
First Claim
1. A method of controlling an asymmetric waveform generated as a combination of a plurality of sinusoidal waves including two sinusoidal waves having a frequency that differs by a factor of two, the method comprising the steps of:
- sampling the generated asymmetric waveform to obtain a set of data points that is indicative of the generated asymmetric waveform;
normalizing each data point of the set of data points;
determining at least a value relating to the normalized data points;
comparing the determined at least a value to template data relating to an ideal asymmetric waveform; and
,in dependence upon the comparison, effecting a change to the generated asymmetric waveform.
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Accused Products
Abstract
A method of controlling an asymmetric waveform that is generated as a combination of a plurality of sinusoidal waves, including two sinusoidal waves having a frequency that differs by a factor of two. The method includes the steps of sampling the generated asymmetric waveform to obtain a set of data points that is indicative of the generated asymmetric waveform. Each data point of the set of data points normalized. The method further includes the steps of determining at least a value relating to the normalized data points of comparing the determined at least a value to template data relating to an ideal asymmetric waveform, and of effecting a change to the generated asymmetric waveform in dependence upon the comparison.
11 Citations
28 Claims
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1. A method of controlling an asymmetric waveform generated as a combination of a plurality of sinusoidal waves including two sinusoidal waves having a frequency that differs by a factor of two, the method comprising the steps of:
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sampling the generated asymmetric waveform to obtain a set of data points that is indicative of the generated asymmetric waveform; normalizing each data point of the set of data points; determining at least a value relating to the normalized data points; comparing the determined at least a value to template data relating to an ideal asymmetric waveform; and
,in dependence upon the comparison, effecting a change to the generated asymmetric waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of controlling an asymmetric waveform generated as a combination of a plurality of sinusoidal waves including two sinusoidal waves having a frequency that differs by a factor of two, the method comprising the steps of:
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sampling the generated asymmetric waveform to determine a plurality of data points from a plurality of different cycles of the generated asymmetric waveform, the plurality of data points being indicative of a shape of the generated asymmetric waveform; analyzing the plurality of data points indicative of a shape of the generated asymmetric waveform, the step of analyzing being performed other than in dependence upon an order of magnitude of the data points; and
,in dependence upon the step of analyzing, effecting a change to the generated asymmetric waveform. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A storage medium encoded with machine-readable computer program code for controlling an asymmetric waveform generated as a combination of a plurality of sinusoidal waves including two sinusoidal waves having a frequency that differs by a factor of two, the storage medium including instructions for:
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obtaining a set of data points that is indicative of the generated asymmetric waveform; normalizing the data points of the set of data points; applying a predetermined function to the normalized data points of the set of data points, to determine a set of resultant values including one resultant value corresponding to each normalized data point of the set of normalized data points; determining at least a value relating to the set of resultant values; comparing the determined at least a value to template data relating to an ideal asymmetric waveform; and
,in dependence upon the comparison, adjusting at least one of a phase angle difference between the two sinusoidal waves and an amplitude of at least one of the two sinusoidal waves. - View Dependent Claims (28)
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Specification