Patent ID: 6335844
Filing Date: 2002-01-01
Classification: G11B

Abstract:
A magnetic recording apparatus comprising:a magnetic head for writing data to a magnetic disk; a writing circuit for feeding a write current to the magnetic head; and a temporary shutoff circuit for temporarily deactivating the writing circuit until a parasitic capacitor present in the writing circuit is charged and thereafter activating the writing circuit when electric power starts being supplied, wherein the writing circuit has a first transistor for writing, the first transistor having an input terminal fed with data to be written and having an output terminal connected to the magnetic head, and the temporary shutoff circuit has a second transistor and a third transistor connected to a collector of the second transistor, the temporary shutoff circuit temporarily deactivating the first transistor when electric power starts being supplied by pulling into the third transistor a transient current resulting from variation in a base voltage of the second transistor as a result of a parasitic capacitance present at a base of the second transistor being charged when electric power starts being supplied.