Patent ID: 8754695

Claim:
A buffer, comprising: a driver, the driver comprising: a pull-up circuit coupled to a supply voltage node and an output node; a pull-down circuit coupled to a reference voltage node and the output node; and a drive adjust circuit coupled to at least one of the pull-up circuit and the pull-down circuit, the drive adjust circuit configured to receive a feedback signal and, based at least in part on the feedback signal, adjust a current conducted through the at least one of the pull-up and pull-down circuits; wherein the feedback signal is provided by a feedback generator, the feedback generator comprising: a differential amplifier with a positive input node, a negative input node, and an output node; a first model driver coupled to the positive input node of the differential amplifier and configured to model a driving driver; and a second model driver coupled to the negative input node of the differential amplifier and configured to model a receiving driver, wherein the feedback signal is provided from the output node of the differential amplifier.