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. 13, 2004
Filed:
Jan. 31, 2001
Applicant:
Inventors:
Christopher Cheng, Los Gatos, CA (US);
Josh Price, Livermore, CA (US);
Assignee:
3PARdata, Inc., Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 5/02 ;
U.S. Cl.
CPC ...
H01P 5/02 ;
Abstract
A new method to control differential signal trace impedance allows flexible use of different signal trace width and spacing while maintaining constant differential impedance in printed circuit boards. Differential impedance of a signal pair is determined by the geometry of individual traces and the spacing between traces. The value of the differential impedance is inversely proportional to signal trace width and directly proportional to signal trace spacing. By decreasing or increasing trace width and spacing simultaneously, a constant differential impedance can be achieved.