Patent ID: 6891901
Filing Date: 2005-05-10
Classification: H04L

Abstract:
1. A data transmission device for generating an output signal to be transmitted via a transmission line, the output signal including a transmission signal and a direct current (DC) supply voltage, comprising: a first terminal allocated to a first wire of the transmission line; a second terminal allocated to a second wire of the transmission line; a first output driver for generating a first split signal to be transmitted via the first wire of the transmission line; a second output driver for generating a second split signal to be transmitted via the second wire or the transmission line, whereby an alternating current (AC) current-related difference of the two split signals corresponds to the transmission signal; a first resistor located between an output of the first output driver and the first terminal; a second resistor located between an output of the second output driver and the second terminal; a first filter device to separate a first DC supply voltage component from a decreasing voltage measured by a first measurement device and decreasing at the first resistor; a second filter device to separate a second DC supply voltage component from a decreasing voltage measured by a second measurement device and decreasing at the second resistor; a first adding device to add a first adding signal corresponding to the first DC supply voltage component to the first split signal fed to the first output driver; and a second adding device to add a second adding signal corresponding to the second DC supply voltage component to the second split signal fed to the second output driver.