Method and apparatus for digital quadrature lock-in...

Electricity: measuring and testing – Particle precession resonance – Spectrometer components

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S321000

Reexamination Certificate

active

11474100

ABSTRACT:
A method and apparatus for digital quadrature lock-in detection capable of receiving magnetic resonance signals or electron spin resonance signals at high sensitivity. The method starts with digitizing a signal wave consisting of a magnetic resonance or electron spin resonance signal. The digitized signal wave is multiplied by digitized reference waves of sine and cosine functions to obtain signals of real and imaginary parts which are 90° out of phase (multiplying step). The frequencies of the sine and cosine functions are varied according to the observation width. The multiplying step is repeated.

REFERENCES:
patent: 4803700 (1989-02-01), Dewey et al.
patent: 4992736 (1991-02-01), Stormont et al.
patent: 5907585 (1999-05-01), Suzuki et al.
patent: 2005/0093545 (2005-05-01), Yoshizawa
patent: 2005/0099182 (2005-05-01), Park et al.
patent: 4-327835 (1992-11-01), None
patent: 04-357937 (1992-12-01), None
patent: 05-317285 (1993-12-01), None
patent: 10-099293 (1998-04-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for digital quadrature lock-in... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for digital quadrature lock-in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for digital quadrature lock-in... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3906044

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.