Patent ID: 7586330

Claim:
A pre-emphasis apparatus of a low voltage differential signaling (LVDS) transmitter, the pre-emphasis apparatus comprising: a pre-emphasis signal generation unit configured to generate a pre-emphasis pulse signal by performing a logical operation on N parallel data signals received from an external source and N-phase clock signals received from a phase locked loop, where N is an integer greater than 1; and a pre-emphasis current output unit configured to provide an additional current for a pre-emphasis operation to a LVDS driver in response to the pre-emphasis pulse signal generated by the pre-emphasis pulse signal generation unit, wherein the pre-emphasis pulse signal generation unit comprises: N exclusive OR gates configured to perform an XOR operation on an input first parallel data signal and an input second parallel data signal adjacent to the input first parallel data signal to respectively output a first operational signal; N AND gates configured to perform an AND operation on the first operational signal and one of the N-phase clock signals corresponding to the input second parallel data signal to respectively output second operational signals; and an OR gate configured to perform an OR operation on the second operational signals output from the AND gates to output the pre-emphasis pulse signal.