Patent ID: 7180950
Filing Date: 2007-02-20
Classification: H04B

Abstract:
1. A circuit connected between a module and a pair of wires, the circuit comprising: a first connection line for connection to a first wire in the pair of wires; a second connection line for connection to a second wire in the pair of wires; radio frequency termination circuitry coupled between the first connection line and the second connection line; a first transformer having a first inductance and a second inductance, a first end of the first inductance being coupled to the first connection line and a first end of the second inductance being coupled to the second connection line; a second transformer including: a feedback cancellation filter coupled to the first end of the second inductance of the second transformer, the second end of the second inductance of the second transformer, the first connection line and the second connection line, the feedback cancellation filter being used to cancel common-mode noise on the first connection line and the second connection line.