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, 2009
Filed:
Sep. 29, 2005
Rudolf P. Ruizenaar, Delft, NL;
Alexius O. Looije, Naaldwijk, NL;
William N. Cuipylo, Auburn, NY (US);
Rudolf P. Ruizenaar, Delft, NL;
Alexius O. Looije, Naaldwijk, NL;
William N. Cuipylo, Auburn, NY (US);
Welch Allyn, Inc., Skaneateles Falls, NY (US);
Abstract
A method and apparatus for providing galvanic isolation for signal communication between two electrical circuits via a capacitive coupler that is constructed from conductive and non-conductive layers of a printed circuit board. The invention can provide at low cost and with substantial galvanic isolation, the communication of data at rates of greater than 1 megabit per second. The galvanic isolation provided by the invention protects against common mode fields as well as limited differential mode fields. The invention makes use of pre-existing layers of a circuit board and does not require many other or expensive electrical components.