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:
Jul. 02, 1996
Filed:
May. 16, 1994
Applicant:
Inventor:
Russell A Hershbarger, Nevada City, CA (US);
Assignee:
Silicon Systems, Inc., Tustin, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375257 ; 375318 ; 333 33 ; 34031005 ;
Abstract
A method and apparatus for passing a high frequency signal across an isolation barrier while rejecting low frequency common mode interference is provided. A high frequency signal is coupled across an isolation barrier. A circuit comprising an element having an impedance that is a function of frequency rejects low frequency common mode interference. The high frequency signal is provided as an output. The present invention is useful, for example, for isolating telephone apparatus, such as a telephone modem, from a telephone line.