Hybrid mode repeater/re-driver for high speed digital video signaling

摘要

A system and a method are disclosed for a hybrid mode re-driver which, among other advantages, reduces power consumption while maintaining signal integrity. Equalization is performed on a signal to remove distortions such as inter-symbol interference. The signal is then analyzed and the quality of the signal is assessed. In some cases, retiming is then performed on the signal to remove additional signal distortions. In other cases, retiming is not performed and is transmitted to a driver while bypassing retiming components. When retiming components are bypassed, the retiming components are placed in a state of reduced power consumption to reduce system power consumption.

主权项

1. A method for signal re-driving, the method comprising:
receiving, by a re-driving device, a video signal from a graphic processing unit; performing distortion removal on the received video signal using an equalizer to remove jitter from the received signal; generating an equalized video signal by the equalizer analyzing, by a distortion mode selector, characteristics of the equalized video signal, the characteristics of the equalized video signal including at least data rate; determining, in real time by the distortion mode selector, whether to employ a retimer circuit to remove distortion from the equalized video signal or to bypass the retimer circuit based at least in part on the analysis, the retimer circuit configured to receive the equalized video signal from the adaptive equalizer circuit and generate a re-timed video signal by recovering a clock and data components of the received video signal and transmitting a reconstructed video signal using the recovered clock; generating, by the distortion mode selector:
a selection signal having a first state based on a determination to re-time the equalized video signal using the retimer circuit, and the selection signal having a second state based on a determination to bypass retiming the equalized video signal; responsive to a determination to bypass retiming the equalized video signal, sending the selection signal having the second state to a multiplexer for selecting the equalized video signal for output by the re-driver circuit, and sending an instruction to the retimer circuit for reducing the power consumption of the retimer circuit.