Nuclear magnetic resonance apparatus with switched attenuator

Details Nuclear magnetic resonance apparatus with switched attenuator Nuclear magnetic resonance apparatus with switched attenuator

1986-04-30

1987-10-20

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324303, 307262, 307555, 328223, G01R 3320

Patent

active

047017112

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 attenuated by connecting resistors across a second winding inductively coupled to the first winding. Connection of the resistors is made when required by forward biasing two MOSFETs connected "back to back" to reduce transients when the MOSFETs cease conduction. A switching pulse for the MOSFETs which has a steep rising edge and an exponential trailing edge has been found advantageous.

REFERENCES:
patent: 2527474 (1950-10-01), Alvarez
patent: 3360732 (1967-12-01), Haugh et al.
patent: 3617867 (1971-11-01), Herzog
patent: 3763478 (1973-10-01), Yoshizawa et al.
patent: 4350955 (1982-09-01), Jackson et al.
patent: 4565968 (1986-01-01), Macovski
patent: 4629986 (1986-12-01), Clow et al.

Affiliated with

Also associated with

Rating

Nuclear magnetic resonance apparatus with switched attenuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nuclear magnetic resonance apparatus with switched attenuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nuclear magnetic resonance apparatus with switched attenuator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1614677