METHOD OF AND APPARATUS FOR NUCLEAR MAGNETIC RESONANCE ANALYSIS USING TRUE LOGARITHMIC AMPLIFIER

摘要

2066230 9103743 PCTABS00003 A true logarithmic amplifier (70) is used in combination with an apparatus (38) for transmitting and receiving signals produced during nuclear magnetic resonance analysis. The true logarithmic amplifier (70) 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 (70) by stronger signals and preserving all phase information and hence sideband components of the received signals for processing and analysis.