The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1993
Filed:
May. 18, 1992
Applicant:
Inventor:
Albert Macovski, Menlo Park, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
324309 ; 324307 ;
Abstract
Signals from precessing magnetic moments are received in the presence of a cyclically varying bias field to avoid the phase error buildup due to inhomogeniety. The bias field has substantially a zero average value and can either use a pulse or a symmetrical waveform. The demodulating signal is based on the frequency of the cyclical variations.