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:
Oct. 01, 1991
Filed:
Dec. 06, 1990
Applicant:
Inventor:
Howard W Johnson, Sunnyvale, CA (US);
Assignee:
Ultra Network Technologies, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307514 ; 307262 ; 328133 ; 328155 ; 331 / ; 375120 ;
Abstract
A phase detector particularly suited for high speed, digital data. The data is auto-correlated with the data shifted through a flip-flop where the flip-flop is clocked by the clocking signal. The data is also delayed by one period by an analog delay line. The output of the flip-flop is auto-correlated with the data and with the data shifted by one period to provide an error signal for a VCO. Ordinary ECL circuits in leaded packages may be employed with data rates in the 300 MHz range.