from the tuning at the emission stage, through , but
during echo reception (step generator in off-state), these
pulser components can also exert a negative distortion
as of a given amplitude in received signals. To simulate
these effects from non-linear circuits, we propose to add
a circuital model for the receiver, including several nonidealities. Fig. 3 depicts an equivalent model for
this stage including piezoelectric and electronic aspects.