An electric fuel pump is disclosed which includes a pump portion, a motor portion, a housing, and a fuel passage. magnetic resonance signal data in dependence upon a magnetic resonance signal time series are received. Executing model components are monitored, and depending on certain performance characteristics, a model component can be replaced with a different version of that model component. Since the attenuation factor changes in a stepwise manner by the provision of target data alone from the outside which corresponds to the attenuation factor as the target value, signal distortion is minimized. The capacitance between BL and BLN are substantially reduced as well as the capacitance to neighboring column BLs and BLNs. The devices are readily compact, accurate and therefore capable of implementation in a variety of system applications.