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:
Nov. 20, 1990
Filed:
Sep. 30, 1988
Applicant:
Inventor:
Hans D Brust, Dudweiler, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
3241 / ; 3241 / ; 250310 ;
Abstract
A method and apparatus provide compensation of frequency drift phenomenon of a signal to be investigated in an electron beam measuring unit. A regulating signal is acquired from the signal to be investigated and the modulation frequency (f.sub.b) of a beam blanking generator in the electron beam measuring arrangement is modified therewith in accordance with the frequency drift in the investigated signal.