A driver apparatus is provided for use with a biopsy instrument, the driver apparatus including a housing and an insertion mechanism including a carriage movably associated with the housing and adapted to support the biopsy instrument to affect longitudinal movement of at least a portion of the biopsy instrument. The ferromagnetic fine particles consist of 1-xPtx,, 1-xPdx, or 1-xx,. The recordingreproducing apparatus also detects a recorded level of each succession of sound data to be recorded onto the medium, and then records the detected recorded level onto the medium in association with the sound data. The gate electrodes of the second PMOS and second NMOS transistor devices extend along a second gate electrode track.