Patent ID: 6844995
Filing Date: 2005-01-18
Classification: G11B

Abstract:
1. A head protection device in a data recording circuit in which write-current of a given level that corresponds to a high or low level of coercive force of the magnetic recording portion of a recording medium is provided as an output and supplied to a magnetic head for data recording and reproduction, the data recording circuit comprising: an alternate write-current supply portion for alternately providing, by a suitable current switching means, a low write-current corresponding to a low coercivity magnetic head and a high write-current corresponding to a high coercivity magnetic head; and a common output portion for providing data to be recorded using a low current or a high current from the alternate write-current supply portion, wherein the low coercivity magnetic head and the high coercivity magnetic head can be at least electrically switched; and a current protection portion for a current switching means being provided so as to prevent generation of high write-current at the alternate write-current supply portion.