Systems and methods for automated resonant circuit tuning
First Claim
1. A method for automated tuning of a resonant circuit when detecting a chiral property of a sample, comprising:
- populating a data structure with a plurality of frequencies, the plurality of frequencies being pre-determined within an expected range of frequencies for the resonant circuit;
generating a driving signal using one of the plurality of frequencies in the data structure;
applying the driving signal to the resonant circuit while detecting a chiral property of the sample based at least in part upon the one of the plurality of frequencies in the data structure;
measuring a feedback signal associated with the driving signal; and
adjusting the driving signal to use another one of the plurality of frequencies in the data structure in response to the feedback signal.
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Abstract
An apparatus and method for automatically tuning a resonant circuit in a chiroptical measurement system. A sample cell holds a sample being measured for a chiroptical property as the sample is modulated by the resonant circuit. A signal source coupled to the resonant circuit generates a driving signal at one of a plurality of frequencies to modulate the resonant circuit. The frequencies are within a range of expected resonant frequencies for the resonant circuit. A feedback loop circuit coupled to the signal source is used to adjust the frequency of the driving signal to another of the frequencies in response to a feedback signal associated with a measured parameter of the driving signal. In this way, the frequency of the driving signal is adjusted to create a resonant condition. The driving signal may also be applied at a reduced power level so that the resonant circuit can be driven at off-resonant frequencies within the range of frequencies.
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Citations
14 Claims
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1. A method for automated tuning of a resonant circuit when detecting a chiral property of a sample, comprising:
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populating a data structure with a plurality of frequencies, the plurality of frequencies being pre-determined within an expected range of frequencies for the resonant circuit;
generating a driving signal using one of the plurality of frequencies in the data structure;
applying the driving signal to the resonant circuit while detecting a chiral property of the sample based at least in part upon the one of the plurality of frequencies in the data structure;
measuring a feedback signal associated with the driving signal; and
adjusting the driving signal to use another one of the plurality of frequencies in the data structure in response to the feedback signal.
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2. A method for automated tuning of a resonant circuit when detecting a chiral property of a sample, comprising:
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applying a driving signal to the resonant circuit, the driving signal having a driving frequency within a range of frequencies;
monitoring a resonance parameter of the driving signal as part of a feedback loop to produce a feedback signal; and
adjusting the frequency of the driving signal according to the monitored resonance parameter, the adjusted frequency of the driving signal modulating a probe beam of light used for detecting the chiral property of the sample. - View Dependent Claims (3, 4, 5, 6, 7)
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8. An apparatus for automated tuning of a resonant circuit when detecting a chiral property of a sample, comprising:
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a sample cell for holding the sample, the sample cell being modulated by the resonant circuit;
a signal source coupled to the resonant circuit, the signal source being capable of generating a driving signal at one of a plurality of frequencies to modulate the resonant circuit, the plurality of frequencies being within a range of expected resonant frequencies for the resonant circuit; and
a feedback loop circuit coupled to the signal source and operative to adjust the one of the plurality of frequencies of the driving signal to another of the plurality of frequencies in response to a feedback signal, the feedback signal being associated with a measured parameter of the driving signal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An apparatus for automated tuning of a resonant circuit when detecting a chiral property of a sample, comprising:
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a light source for generating a probe beam of light;
a sample cell for holding the sample and a solvent for the sample as the probe beam of light is exposed to the sample, the probe beam of light being modulated by the resonant circuit;
a modulation source coupled to the resonant circuit, the modulation source applying a driving signal at one of a plurality of frequencies to the resonant circuit, the plurality of frequencies being within a range of expected resonant frequencies for the resonant circuit;
a monitoring circuit for monitoring a measured parameter of the driving signal as the driving signal is applied to the resonant circuit; and
a feedback circuit coupled to the modulation source and operative to adjust the one of the plurality of frequencies of the driving signal to another of the plurality of frequencies in response to a feedback signal, the feedback signal being associated with the measured parameter of the driving signal.
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Specification