provide an oddout signal that is no longer the complement of the evenout signal the phase inverter 130 can have the same propagation delay for both the evenout signal and the oddout signal so that the phase of the evenout signal differs from the phase of oddout signal by only the propagation delay though one of the nand gates 126 as a result the size of the coarse delay over which the phase mixer 110 is only approximately half the size of the coarse step over the phase mixer 80 used in the dll 30 must interpolate therefore the linearity of the phase mixer 110 used in the dll 100 should be significantly improved the delay line 120 used in the dll 100 does invert the clk ref signal over an odd number of delay stages 124 to provide either the evenout signal or the oddout signal however the mismatch between the number of rising edge transitions of the clr ref signal compared to the number of falling edge transitions of the clk ref is a single leading edge or rising edge transition therefore for example if there are 72 delay stages 124 the clk ref may have a duty cycle that deviates from 50 only to the extent of a disparity in the rise time and fall time of a single.