Patent ID: 7079644
Filing Date: 2006-07-18
Classification: H01F,H03H

Abstract:
1. An input-output balanced filter comprising: first and second input terminals and first and second output terminals; a first LC filter circuit unit including a common side line, said first LC filter circuit unit being connected between said first input terminal and said first output terminal; a second LC filter circuit unit including a common side line, said second LC filter circuit unit being connected between said second input terminal and said second output terminal; a common line defined by an element that is independent of said first LC filter circuit unit and said second LC filter circuit unit; wherein said common side line of said first LC filter circuit unit is electrically and directly connected to said common side line of said second LC filter circuit unit via said common line; an approximate midpoint of said common line is defined as a common phase reference point of each of said first and second LC filter circuit units; and at least one of the first LC filter circuit unit and the second LC filter circuit unit includes two resonant portions connected via a capacitor.