Patent ID: RE42291

Claim:
A digital communication system for processing Digital Visual Interface (DVI) transition minimized differential signal ( TMDS ) communication data signals and Display Data Channel (DDC) communication signals over a transmission line, the system comprising: an open-loop equalizer circuit operable to receive DVI TMDS communication signals transmitted over the transmission line and output equalized DVI TMDS communication data signals, the open-loop equalizer circuit comprising: a differential pair defining first and second inputs; a reactive load coupled to the differential pair; and a pair of input follower circuits configured to receive the DVI TMDS communication data signals and feedback signals from the reactive load and generate corresponding first and second input signals for the first and second inputs of the differential pair; the open-loop equalizer circuit providing either proportional or disproportional equalization to the TMDS communication data signal, wherein proportional equalization provides a frequency dependent gain that is at or about the inverse of a frequency dependent attenuation caused by the transmission line, the DVI communication data signal being proportionately equalized, and if the open-loop equalizer wherein disproportionate equalization provides a frequency dependent gain that is greater than the inverse of a frequency dependent attenuation caused by the transmission line , then the DVI communication data signal being disproportionately equalized .