FREQUENCY SWITCHING METHOD APPLICABLE TO MASS SPECTROMETER MULTIPOLE RF DRIVE SYSTEMS
First Claim
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1. A system comprising:
- a mass analyzer;
an ion source for providing ions to the mass analyzer;
a detector coupled to the mass analyzer for detecting ions; and
a frequency-selectable power source including;
an energy supply configured to provide high-voltage radio-frequency (RF) energy to the mass analyzer at individually selectable first and second frequencies, anda frequency selector for switching between the individually selectable first and second frequencieswherein;
a) the energy supply comprises;
a power amplifier having an output;
a signal source for providing an oscillating signal to the power amplifier; and
a step-up circuit for magnifying the power amplifier output, the step-up circuit including an LC resonator network tunable to the oscillating signal frequency,b) the frequency selector is configured to set the oscillating signal frequency to one of the two individually selectable first and second frequencies, and includes a switch for tuning the LC resonator network to the set oscillating signal frequency, andc) the LC resonator network includes a resonator having coil windings and a coil inductance, and wherein the switch is configured to change said coil inductance.
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Abstract
In one embodiment, a system includes a mass analyzer, an ion source for providing ions to the mass analyzer, a detector for detecting an output of the mass analyzer, and a frequency-selectable power source. The frequency-selectable power source may include an energy supply configured to provide high-voltage radio-frequency (RF) energy to the mass analyzer at individually selectable first and second frequencies, and a frequency selector for switching between the individually selectable first and second frequencies.
2 Citations
22 Claims
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1. A system comprising:
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a mass analyzer; an ion source for providing ions to the mass analyzer; a detector coupled to the mass analyzer for detecting ions; and a frequency-selectable power source including; an energy supply configured to provide high-voltage radio-frequency (RF) energy to the mass analyzer at individually selectable first and second frequencies, and a frequency selector for switching between the individually selectable first and second frequencies wherein; a) the energy supply comprises; a power amplifier having an output; a signal source for providing an oscillating signal to the power amplifier; and a step-up circuit for magnifying the power amplifier output, the step-up circuit including an LC resonator network tunable to the oscillating signal frequency, b) the frequency selector is configured to set the oscillating signal frequency to one of the two individually selectable first and second frequencies, and includes a switch for tuning the LC resonator network to the set oscillating signal frequency, and c) the LC resonator network includes a resonator having coil windings and a coil inductance, and wherein the switch is configured to change said coil inductance. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 21, 22)
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2-3. -3. (canceled)
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13-20. -20. (canceled)
Specification