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:
May. 14, 2002
Filed:
Jul. 12, 2000
Applicant:
Inventor:
Afshin Momtaz, Irvine, CA (US);
Assignee:
NewPort Communications, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/093 ; H03L 7/089 ;
U.S. Cl.
CPC ...
H03L 7/093 ; H03L 7/089 ;
Abstract
A phase locked loop circuit having a loop filter including a variable resistance for normal loop operation and for fast acquisition has improved stability by defining a loop pole separate from the loop filter. The loop pole remains constant during transition periods of the filter resistance. The loop pole remains constant while loop bandwidth is varied for either phase acquisition or normal operation, and the ratio of bandwidth to pole varies only linearly which makes the phase locked loop more stable during the bandwidth adjustment.