Patent ID: 6956944

Claim:
An apparatus for compensating for echo signal in a telecommunications device comprising: a first differential transmitter having an output terminal coupled to a first transmitted signal node; a second differential transmitter having an output terminal coupled to a second transmitted signal node; a first current limiting resistor having a first terminal coupled to the first transmitted signal node and a second terminal coupled to a first line transformer node; a second current limiting resistor having a first terminal coupled to the second transmitted signal node and a second terminal coupled to a second line transformer node; a first sampling resistor having a first terminal coupled to the first line transformer node and a second terminal connected to a first received signal node; a second sampling resistor having a first terminal coupled to the second line transformer node and a second terminal connected to a second received signal node; a first compensation circuit having a first terminal coupled to the first transmitted signal node and a second terminal coupled to the first received signal node; a second compensation circuit having a first terminal coupled to the first transmitted signal node and a second terminal coupled to the second received signal node; a third compensation circuit having a first terminal coupled to the second transmitted signal node and a second terminal coupled to the second received signal node; and a fourth compensation circuit having a first terminal coupled to the second transmitted signal node and a second terminal coupled to the first received signal node.