Controlled velocity head parking circuit

Details Controlled velocity head parking circuit Controlled velocity head parking circuit

1994-12-29

1996-10-15

Kim, Won Tae C.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360105, 318560, 318432, G11B 2102, G11B 554, G05B 1101, H02P 700

Patent

active

055663699

ABSTRACT:
A constant velocity head parking circuit is disclosed. The circuit includes a voice coil motor, a sense resistor, a park voltage source, and a feedback loop. The feedback loop includes a scaling circuit which can be constructed with an op amp and two resistors. The scaling circuit adds a voltage to the park voltage so that any voltage loses in the voice coil motor are compensated for.

REFERENCES:
patent: 4751595 (1988-06-01), Kishi et al.
patent: 4786995 (1988-11-01), Stupeck et al.
patent: 5384524 (1995-01-01), Romano
Allegro MicroSystems, Inc., May 27, 1992, Voice Coil Motor Driver 8932-A Product Specification.

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