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:
Jun. 03, 1986
Filed:
Sep. 12, 1984
Applicant:
Inventor:
Howard D Hill, Cupertino, CA (US);
Assignee:
Varian Associates, Inc., Palo Alto, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324307 ; 324 / ; 324318 ;
Abstract
The RF probe of a quadrature sensitive FT-NMR spectrometer is tuned and matched to its electrical environment by utilizing the phase quadrature sensitivity of said spectrometer to function as an impedance vector analyzer for the probe in situ. Phase and amplitude measurements of the in situ probe are compared to an occasionally measured and stored amplitude and phase characteristic observed when the probe is replaced by a 50 ohm terminator.