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:
Jan. 27, 2004
Filed:
Sep. 22, 2000
Applicant:
Inventor:
Bruce H. Coy, San Diego, CA (US);
Assignee:
Applied Micro Circuits Corporation, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 2/714 ; H04L 2/716 ; H04L 2/722 ;
U.S. Cl.
CPC ...
H04L 2/714 ; H04L 2/716 ; H04L 2/722 ;
Abstract
A dual loop system for the acquisition and tracking of a carrier signal is presented. The acquisition loop uses a bang-bang phase detector which permits the carrier to be acquired without a clock reference. Once acquired, the carrier is then tracked with a loop using a Hogge phase detector. The tracking loop is autoscaling, so that loop gain and bandwidth are responsive to the carrier signal frequency. The autoscaling feature of the tracking loop and the uniform gain of the acquisition loop permit the same loop filter to be shared by both loops. A method implementing the above-described dual-loop system is also presented.