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. 02, 2004
Filed:
May. 22, 2001
Anthony D. Sayers, Crawley, GB;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An RF circuit configured to inteface a balanced port ( ) with an unbalanced port ( ) by emulating the function of a balun. Reactive components ( ) in both branches of a balanced circuit form two resonant circuits by resonating with parasitic reactance. At a predetermined operating centre frequency, one of the two resonant circuits is above resonance and the other is below resonance, resulting in a 180° phase difference between the signals delivered by the two branches. When used to interface an unbalanced signal source ( ) to a balanced load ( ), the input impedance may be set to a real value matching the output impedance of the signal source by selection of the reactive component ( ) values.