Patent ID: 9513655
Filing Date: 2016-12-06
CPC Classification: G05F,H04L

Claim Text:
1. An interface circuit for transmitting a signal, comprising: a pre-driver coupled to receive a single-ended signal, wherein the pre-driver is coupled to convert the single-ended signal to an intermediate differential signal, wherein the intermediate differential signal has a first voltage swing responsive to a first supply voltage supplied to the pre-driver; an output driver coupled to receive the intermediate differential signal from the pre-driver, wherein the output driver is coupled to convert the intermediate differential signal to an output differential signal, wherein the output differential signal has a second voltage swing responsive to a second supply voltage supplied to the output driver; a replica bias circuit coupled to receive the first supply voltage to generate a bias signal, wherein the replica bias circuit is coupled to receive an open termination enable signal to adjust the bias signal in response to the open termination enable signal; an internal regulator coupled to receive the bias signal and the first supply voltage to supply the second voltage to the output driver in response to the bias signal; and an open termination circuit coupled to an output of the output driver, wherein the open termination circuit is coupled to receive the open termination enable signal to couple an internal load to the output of the output driver in response to the open termination enable signal.