Capacitor assisted low voltage write circuit

Details Capacitor assisted low voltage write circuit Capacitor assisted low voltage write circuit

1993-02-01

1994-07-19

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 46, 360 66, 360 67, G11B 502, G11B 503, G11B 509

Patent

active

053314794

ABSTRACT:
A write circuit in a magnetic disc drive writes data to a magnetic disc based on a write signal received. The write circuit includes a magnetic write head, an H-switch, and a headroom assistance circuit. The headroom assistance circuit includes a voltage divider, a capacitor, and a charging circuit for charging and discharging the capacitor based on the write signals so that increased voltage appears across the magnetic recording write head during switching of the current polarity by the H-switch.

REFERENCES:
patent: 4647988 (1987-03-01), Takehara
patent: 4651235 (1987-03-01), Morita et al.
patent: 5067032 (1991-11-01), Ida

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