Hardened DVI interface

摘要

A hardened DVI transmitter includes a differential driver to convert a ground-up DVI signal into a balanced DVI signal. The balanced DVI signal is transmitted to a DVI compliant cable, through one or more transformers. Transformers effectively remove direct current interference from sources such as lightning. A hardened DVI receiver receives the balanced DVI signal, from the DVI compliant cable, through one or more complimentary transformers. The balanced DVI signal is then converted back to a ground-up DVI signal. By this method, DVI compliant signals may be sent through DVI cables longer than ten meters, and survive interference from lightning.

主权项

1. An apparatus for transmitting a digital visual interface (DVI) signal, comprising:
a differential driver; a differential receiver; one or more transformers, each of the one or more transformers connected to the differential driver and differential receiver; and at least one cable equalizer interposed between one of the one or more transformers and the differential receiver; wherein: the cable equalizer circuit is configured to recover high frequency components of at least one of the one or more balanced DVI signals; the differential driver is configured to receive one or more ground-up DVI signals; the differential driver is configured to convert the one or more ground-up DVI signals into one or more balanced signals, each comprising two waveforms of substantially similar magnitude but opposite voltage with reference to a ground; the one or more transformers are configured to receive the two waveforms and transmit the two waveforms to a DVI compliant cable; and the differential driver and one or more transformers are configured to remove all direct current signals before transmitting the two waveforms via the DVI compliant cable.