Method of and apparatus for nuclear magnetic resonance analysis using true logarithmic amplifier
US4994746A · kind A · utility
17Cited by
1References
16Claims
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Key dates
| Filing date | Sep 5, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/465
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A true logarithmic amplifier is used in combination with an apparatus for transmitting and receiving signals produced during nuclear magnetic resonance analysis. The true logarithmic amplifier is used to compress the dynamic range of signals produced by the reorientation of excited magnetic dipoles such as those of protons as they return to an aligned, unexcited state, with the compression of the dynamic range avoiding saturation of the amplifier by strong signals and preserving all phase information and hence sideband components of the received signals for processing and analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.