Digital Q-Meter for continuous-wave NMR
US11726153B2 · kind B2 · utility
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3References
14Claims
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Key dates
| Filing date | Jun 17, 2020 |
| Grant date | Aug 15, 2023 |
| Priority date | — |
| Expiry date | Nov 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/1215
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method to perform continuous-wave NMR measurements of nuclear magnetization at high magnetic fields, above 2.5 T, without analog down-mixing is described. An FPGA controls a digital clock pulse which is used to stimulate a resonant circuit and provide a reference signal. An algorithm determines the real portion of a resonant circuit signal near the Larmor frequency of the species of interest using only two measurements of the waveform per cycle. The FPGA automatically alters a variable capacitance to tune the resonant circuit to the Larmor frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.