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. 16, 1999
Filed:
Feb. 18, 1997
Applicant:
Inventor:
Dominic Gerard Farmer, Milpitas, CA (US);
Assignee:
Trimble Navigation Limited, Sunnyvale, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ; H04L / ; H04L / ;
U.S. Cl.
CPC ...
375371 ;
Abstract
The output phase measures output by a digital phase lock loop (DPLL) are selectively modified to reduce instantaneous phase errors incurred whilst waiting until the DPLL locks before obtaining an accurate phase measurement of a signal. In one embodiment, the output phase of a low bandwidth DPLL is selectively modified when the input signal exhibits a significant dynamic transient by adding the error term generated by the DPLL phase detector to the output signal generated by the DPLL to generate a modified output signal used to perform phase measurements.