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. 26, 1991
Filed:
Nov. 13, 1990
Applicant:
Inventor:
Sajol C Ghoshal, Orangeville, CA (US);
Assignee:
Level One Communications, Inc., Folsom, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03L / ; H03L / ; H03L / ;
U.S. Cl.
CPC ...
331 / ; 307516 ; 328133 ; 328155 ; 331 11 ; 331 17 ; 331 25 ; 331 27 ; 331 34 ; 331 57 ; 375120 ;
Abstract
A digitally controlled timing recovery loop is comprised of a digitally controlled Phase Locked Loop (PLL) consisting of a phase detector, loop filter, and voltage controlled oscillator (VCO). The phase detector is a multi-point sampling phase comparator. The loop filter is comprised of a data independent smoothing filter and a command sequencer. The VCO is a digitally controlled ring oscillator with clock phase selection. The timing recovery loop tolerates a relatively large amount of incoming jitter and minimizes data dependent, ISI-induced, intrinsic jitter.