Method of and apparatus for nuclear magnetic resonance analysis using true logarithmic amplifier
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United States of America Patent
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Feb 19, 1991
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N/A
app pub date -
Sep 5, 1989
filing date -
Sep 5, 1989
priority date (Note) -
Expired
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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.
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