Patent ID: 6940673

Claim:
A magnetic reproducing device comprising: a signal detecting means for detecting a signal from a magnetic recording medium by a coil; an amplifying means for amplifying the signal detected by said signal detecting means; a filtering means for filtering the signal amplified by said amplifying means; and a capacitor connected in parallel to the coil of said signal detecting means; wherein the actual resonance frequency of a resonance circuit including said coil, said capacitor and a floating capacitance is set to be four to eight times the maximum reproduction frequency: wherein said magnetic recording medium is a 3.5-inch micro floppy disk, and a control means is further provided for selectively switching the filtering characteristic of said filtering means in response to detection of a magnetic signal from the vicinity of the innermost portion of said 3.5-inch micro floppy disk by said detecting means, or in response to detection of a magnetic signal from the vicinity of the outermost portion of said disk; and wherein said filtering means is switched to a Chebyshev characteristic filter by said control means when a magnetic signal has been detected from the vicinity of the innermost portion of said 3.5-inch micro floppy disk, and said filtering means is switched to a Butterworth characteristic filter when a magnetic signal has been detected from the vicinity of the outermost portion of said disk.