Described are a circuit and system to provide an output signal in response to composite input signal comprising an AC signal component and a DC signal component. A first approach prevents crosstalk by ensuring that each pixel is not able to go into saturation. A capture wire may be located on a delivery tool that is distal to the medical device. The pick-and-place devices also facilitate drying and reduce the sensitivity of drying ovens to coating caliper surges. The rivet heads of each pair are located in opposite flanges and are spaced further from the outer edges of their respective flanges than are the shank portions of other rivets of the pair. The current computed value is compared to a predictive failure value empirically determined for the respective pump design, to determine when failure is likely to be imminent.