Magnetic head driving device with pre-recording energization wit

Details Magnetic head driving device with pre-recording energization wit Magnetic head driving device with pre-recording energization wit

1992-12-18

1994-09-27

Shepperd, John

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 509

Patent

active

053511557

ABSTRACT:
A magnetic head driving device with two inductors sharing a common magnetic core is disclosed. The device includes an inductor for generating a magnetic field, the inductor having a pair of terminals. The device has a first auxiliary coil for storing electromagnetic energy, the first auxiliary coil being connected to one of the terminals of the inductor at a first node, second auxiliary coil for storing electromagnetic energy, the second auxiliary coil being connected to the other terminal of the inductor at a second node, first main switch connected to the first node, second main switch connected to the second node, and control circuit for receiving a first signal indicating generation of a magnetic field by the inductor and a second signal indicating the direction of a magnetic field generated by the inductor and for outputting the second signal for a predetermined period of time in accordance with the first signal to alternately turn on or off the first main switch and the second main switch.

REFERENCES:
patent: 4769724 (1988-09-01), Kusunoki et al.
patent: 4937802 (1990-06-01), Omori et al.
Patent Abstract of Japan, vol. 15, No. 395 (P-1260) Oct. 7, 1991, & JP-A-31 57 839 (Matsushita Electric Ind. Co.).
EPO Search Report.

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