ABSTRACT Transient coupling between the traces in a double-layer printed circuit board (PCB) is analysed for excitation with different signal waveforms involved in the digital circuits. Different types of signals such as trapezoidal, step, impulse and clock are considered for excitation at the source end in a two-layer board having three traces on the top of the substrate. All the traces are matched terminated with 50-ohm loads. The source waveforms are represented by mathematical formulae and the transient crosstalk is computed using transmission line theory. The capacitive and inductive coupling elements are calculated using the Method of Moments (MoM). Initially, the transient crosstalk is calculated on the adjacent victim traces for excitation in a single trace. Subsequently, two different input signals are applied simultaneously to the two side traces and the effect of transient coupling is determined on the middle trace. The computation of the results is done by using MATLAB. The variation of coupling is also studied for different PCB configurations such as spacing between the traces, substrate height and dielectric constant, and terminating loads. The results are compared graphically. It is observed that the transient coupling increases with a decrease in the rise time of the pulses.