Patent ID: 6985578
Filing Date: 2006-01-10
Classification: H04L

Abstract:
1. A broadband line driver comprising: an amplifying device with an input and an output; a transforming device coupled in series with the output of the amplifying device; a first input terminal and a second input terminal as well as a first output terminal and a second output terminal; the amplifying device having a first and a second device input terminal and a first and a second device output terminal; the transforming device comprising: a transformer with transformation ratio 1:n, a primary winding with a first terminal and a second terminal, a secondary winding with a first terminal and a second terminal, the first device output terminal being coupled to a first terminal of the primary winding of the transformer, the second device output terminal being coupled to the second terminal of the primary winding, the first terminal of the secondary winding being coupled to the first output terminal, and the second terminal of the secondary winding being coupled to the second output terminal; a first resistor being connected between the second output terminal and the first device input terminal; and a second resistor being coupled between the first output terminal and the second device input terminal; wherein the transforming device is located in a feedback loop that couples the output of the amplifying device to the input of the amplifying device.