US 7,126,336 B2Granted

Nuclear magnetic resonance apparatus having a controllable detector

AssigneeHitachi, Ltd.

InventorsMinseok Park, Michiya Okada, Hiroshi Morita

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Abstract

In an NMR apparatus having an analog-to-digital converter for converting the voltage signal V(t) to a digital signal, a reference signal generator for generating reference waves which are digital signals, and a quadrature detector for performing a quadrature detection operation, a detection controller for changing a frequency of ωr of the reference waves or a time interval of Δ which is a time interval between data points of digitized NMR signals and also a time interval between data points of the reference waves during detection is installed and furthermore, a storage device for preserving the voltage signal V(t) converted to a digital amount at least until the quadrature detector or the reference signal generator changes the frequency ωr of the reference waves or the time interval Δ is installed between the analog-digital converter and the quadrature detector.

Claims9

Dependent claims

A nuclear magnetic resonance apparatus comprising:

an amplifier amplifying an analog NMR signal received by a detection probe;
an analog-to-digital converter converting said analog NMR signal amplified by said amplifier to a digital NMR signal;
a quadrature detector;
a first storage device installed between the analog-to-digital converter and said quadrature detector configured for preserving said digital NMR signal;
a second storage device configured for preserving NMR measuring conditions including a magnetic field intensity data, a sample temperature data, and a sample rotation data under NMR measurement;
a detection controller reading said NMR measuring conditions from said second storage device and controlling a detection operation;
and
a reference signal generator outputting a reference wave for detection according to an instruction of said detection controller;
wherein said quadrature detector reads said digital NMR signal preserved in said first storage device and performs quadrature detection using a reference signal outputted from said reference signal generator according to said instruction of said detection controller.

6 more elements

Dependencies are inferred from the claim text.