and in 2 the main advantage of the lvds driver with pre emphasis circuit of the present invention is that it starts boosting the output current to the output as soon as input signal changes its state pre emphasis blocks 50 and 60 are directly controlled by the input signals in 1 and in 2 as shown in fig3 a and fig3 b the pre emphasis period for the low to high transition of in 1 starts at time t 1 when in 1 changes its state and it remains for time t upto t 2 which is less than the pulse duration of in 1 pulse duration for in 1 is from time t 1 to t 3 for this period of time pre emphasis blocks 50 and 60 need to have sufficient driving capability to drive the load in the prior art pre emphasis current source transistor p 5 and current sink transistor n 5 have their gates connected to a bias voltage which is an intermediate voltage neither zero nor one provided by the bias cell 30 higher sourcing and sinking capability in p 5 and n 5 requires their sizes to be kept large on the other hand.