Waveform generator for nuclear magnetic resonance apparatus

Details Waveform generator for nuclear magnetic resonance apparatus Waveform generator for nuclear magnetic resonance apparatus

1986-04-30

1987-11-10

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324303, 307262, 307555, 328223, G01R 3320

Patent

active

047060301

ABSTRACT:
Nuclear magnetic resonance is excited in surrounding fluids by pulsing a first winding which with a capacitor forms a resonant circuit. In order to observe signals induced by NMR in the first winding between pulses, the pulses are given an envelope which rises linearly to a peak and then immediately decays linearly to zero. A waveform generator generates bursts of constant amplitude oscillations having a 180.degree. phase change at the centre of each burst. When such bursts are applied to the resonant circuit by way of a drive amplifier and a second winding wound over the first winding, the required envelope is generated in the first winding.

REFERENCES:
patent: 2527474 (1950-10-01), Alvarez
patent: 3239763 (1966-03-01), Cistola
patent: 3617867 (1971-11-01), Herzog
patent: 3763478 (1973-10-01), Yoshizawa et al.
patent: 3768003 (1973-10-01), Amen
patent: 4350955 (1982-09-01), Jackson et al.
patent: 4565968 (1986-01-01), Macovski
patent: 4629986 (1986-12-01), Clow et al.
patent: 4654591 (1987-03-01), Moran

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