Deskew in a high speed link

摘要

Systems and methods for high speed communications are described herein. In certain aspects, the systems and methods include innovative transceiver architectures and techniques for re-timing, multiplexing, de-multiplexing and transmitting data. The systems and methods can be used to achieve reliable high-speed point-to-point communication between different electronic devices, computing devices, storage devices and peripheral devices.

主权项

1. A communication system comprising:
a first transceiver comprising: a differential transmitter configured to generate a differential signal, wherein the differential transmitter comprises a first transmitter configured to generate a first component of the differential signal and a second transmitter configured to generate a second component of the differential signal; a skew adjustment circuit configured to control a timing of transmissions of the first transmitter relative to a timing of transmissions of the second transmitter, wherein the skew adjustment circuit comprises:
a coarse skew adjustment circuit configured to provide a coarse skew adjustment to the differential transmitter; anda fine skew adjustment circuit configured to provide a fine skew adjustment to the differential transmitter, wherein a resolution of the fine skew adjustment is finer than a resolution of the coarse skew adjustment, wherein the fine skew adjustment circuit is configured to generate a first skew adjusted clock signal that controls the timing of transmissions of the first transmitter, and to adjust the first skew adjusted clock signal relative to a clock signal that controls the timing of transmissions of the second transmitter; and a skew control circuit configured to receive a skew indication signal indicating a skew of the differential signal, wherein the skew control circuit is configured to control an amount of skew adjustment provided by the skew adjustment circuit based on the skew indication signal.