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. 31, 1996
Filed:
Dec. 19, 1994
Applicant:
Inventor:
Matti Latva-Aho, Oulu, FI;
Assignee:
Nokia Mobile Phones Ltd., Salo, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
327553 ; 327551 ; 327552 ; 327155 ; 327156 ; 327146 ; 327336 ; 327558 ; 331 17 ;
Abstract
The invention relates to a method and an arrangement for controlling a loop filter of a digital phase lock, the loop filter filtering a difference signal, which comes from a phase comparator at a predetermined bandwidth and is proportional to a phase error. To reduce oscillation in the adjusting method and to eliminate the errors caused by noise, the loop filter is adjusted non-linearly on the basis of the difference signal from the phase comparator in such a manner that the bandwidth of the loop filter changes.