Methods, integrated circuits, apparatuses and buffers with adjustable drive strength

摘要

Buffers, integrated circuits, apparatuses, and methods for adjusting drive strength of a buffer are disclosed. In an example apparatus, the buffer includes a driver. The driver includes a pull-up circuit coupled to a supply voltage node and an output node, and also includes a pull-down circuit coupled to a reference voltage node and the output node. A drive adjust circuit is coupled to at least one of the pull-up circuit and the pull-down circuit, with 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.

主权项

1. An apparatus, comprising:
a driver; and a drive adjust circuit coupled to the driver, 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 driver; wherein the feedback signal is provided by a feedback generator, the feedback generator comprising:
a differential amplifier including two input nodes and an output node;a first model driver coupled to a first input node of the differential amplifier and configured to model a driving driver, and further configured to adjust a drive strength of the first model driver based on the feedback signal; anda second model driver coupled to a second input node of the differential amplifier and configured to model a receiving driver, and further configured to adjust a drive strength of the second model driver based on the feedback signal;wherein the feedback signal is provided from the output node of the differential amplifier.