Line driver with output impedance synthesis

Abstract

A line driver for coupling a data transceiver to a line, including a first amplifier having a first input and a second input and a first output coupled to a first side of the line, the first input being coupled to a first input terminal. The driver includes a second amplifier having a third input and a fourth input and a second output coupled to a second side of the line, the third input being coupled to a second input terminal. The driver further includes a first voltage feedback resistor, having a first voltage feedback resistance, connected between the first output and the second input, and a second voltage feedback resistor, having a resistance substantially equal to the first voltage feedback resistance, connected between the second output and the fourth input. The driver also includes a series resistor, having a series resistance, and having a first side coupled to the first output and a second side coupled to the second output; a gain resistor having a first side connected to the second input and a second side connected to the fourth input. The driver further includes a first current feedback resistor, having a current feedback resistance, connected between the first side of the gain resistor and the first side of the series resistor; and a second current feedback resistor, having a resistance substantially equal to the current feedback resistance, connected between the second side of the gain resistor and the second side of the series resistor.

Dependencies are inferred from the claim text.