Bandwidth extension system using periodic switching

Details Bandwidth extension system using periodic switching Bandwidth extension system using periodic switching

1994-04-20

1996-03-05

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324314, G01V 300

Patent

active

054970903

ABSTRACT:
In applications where a tuned coil is used as a receiving antenna, the coil's resistance can produce excessive noise. If a low-loss coil is used, such as with cooled or supercoductive wire, the resulting Q results in inadequate bandwidth. To provide the desired bandwidth without additional losses the coil and its tuning capacitor are periodically de-energized using one or two switches. This sets the signal to substantially zero where it starts again to build up, effectively widening the bandwidth. The resulting signal is synchronously detected to provide the in-phase and quadrature signals. In an NMR system this enables the performance to be limited by sample or object noise. In MRI systems using an oscillating readout bias, the shorting is timed with the transition of the bias waveform.

REFERENCES:
patent: 5051700 (1991-09-01), Fox
patent: 5166617 (1992-11-01), Ni
patent: 5172061 (1992-12-01), Crooks et al.

Affiliated with

Also associated with

Rating

Bandwidth extension system using periodic switching does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bandwidth extension system using periodic switching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bandwidth extension system using periodic switching will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1415147