Abstract: Magnetic coils (12) create a generally uniform magnetic field through an examination region (10). A radio frequency transmitter applied RF pulses to an RF antenna (26). A gradient field controller (30) generates gradient excitation current pulse profiles which pass through an eddy current calibration circuit (50) to gradient coils (38). A radio frequency receiver (92) receives magnetic resonance signals from the examination region, which signals are Fourier transformed (94) into an image representation (96). The eddy current calibration circuit (50) modifies the current pulse profiles in order to compensate for eddy currents, i.e. to remove the effect of eddy currents such that the resultant gradient magnetic field has a selected profile. An automatic calibration circuit (60) adjusts the decay constant or center frequency of a band pass filter (56) and the gain of an amplifier (58).