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. 27, 2000
Filed:
Aug. 07, 1997
Applicant:
Inventors:
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455264 ; 455255 ;
Abstract
The invention concerns a method and apparatus for providing frequency control of an oscillator circuit. The apparatus includes an oscillator (9), an error estimator (10) f.sub.r producing a set of error estimates and a median filter (11) for producing a median value from the set of estimates. The median filter (11) is connected to the oscillator (9) which is responsive to the median value to vary its frequency thereby reducing the error.