Patent ID: 9515610
Filing Date: 2016-12-06
CPC Classification: H03F

Claim Text:
1. A line driver for driving a load, the line driver comprising: a current amplifier, having an input node arranged to receive an input current of the line driver, and an output node arranged to produce an output current; and a feedback network, coupled between the input node and the output node of the current amplifier, wherein a portion of the output current of the line driver is guided to the feedback network, and an equivalent impedance obtained by looking into the output node of the current amplifier with the feedback network substantially equals an impedance of the load; wherein an impedance of the feedback network is set by RL·(A+1/α), wherein RL is the impedance of the load, A is a gain of the current amplifier, and α is a ratio of an output current generated from the feedback network to the input node of the current amplifier and an input current flowing from the output node of the current amplifier into the feedback network.