Patent ID: 6853220

Claim:
A method for amplifying with pre-emphasis a digital signal representative of data to be transmitted by a line driver over an output line, the method comprising: receiving the digital signal via a first input signal path comprising a first D-type flip-flop being clocked by an externally generated timing signal, and receiving as input the digital signal and outputting the digital signal, and a delay circuit having a predetermined delay, and receiving as input the digital signal and outputting a delayed digital signal; receiving an inverted digital signal via a second input signal path comprising a first D-type flip-flop being clocked by the externally generated timing signal, and receiving as input the inverted digital signal and outputting the inverted digital signal, and a delay circuit having the predetermined delay, and receiving as input the inverted digital signal and outputting a delayed inverted digital signal; and varying a gain of the line driver between an upper value to coincide with switching of the digital signal and a lower value in absence of the digital signal switching, the varying comprising amplifying the digital signal with a first gain for generating an amplified digital signal, amplifying the delayed digital signal with a second gain for generating a delayed and amplified digital signal, and outputting over the output line an ouput signal corresponding to a difference between the amplified digital signal and the delayed and amplified digital signal.