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:
Mar. 06, 2007
Filed:
Feb. 08, 2005
Yit Aun Lim, Boston, MA (US);
Werner E. Maas, Boxford, MA (US);
Yit Aun Lim, Boston, MA (US);
Werner E. Maas, Boxford, MA (US);
Bruker Biospin Corp., Billerica, MA (US);
Abstract
A nuclear magnetic resonance (NMR) probe circuit is used with a sample coil tuned to a primary frequency f. The circuit is arranged to have a plurality of points of electric field minima at the ffrequency. One or more additional frequencies may be coupled to the circuit at these points, without interaction with f. The probe circuit also uses an impedance coupled between two of the minima points that affects the frequency response at the additional frequency or frequencies, without affecting the frequency response at f. The impedance may be made adjustable to allow tuning of the relative frequency resonances.