Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1996-02-28
1997-08-26
Ro, Bentsu
Electricity: motive power systems
Open-loop stepping motor control systems
360 7813, 330307, G11B 1703, H03F 318, H02P 800
Patent
active
056613890
ABSTRACT:
In a floppy disk driver controlling circuit which is for use in controlling a floppy disk driver including a stepping motor (23) and which comprises a stepping motor driver (21) for producing a driving current to drive the stepping motor and a control section (22) for controlling the stepping motor driver, each of the control section and the stepping motor driver includes CMOS transistors as switching transistors. A combination of the control section and the stepping motor driver is formed as a single CMOS integrated circuit (25). The stepping motor driver produces the driving current between 80 mA and 250 mA, both inclusive, to drive the stepping motor when the stepping motor has a diameter which is substantially equal to 15 mm.
REFERENCES:
patent: 4786995 (1988-11-01), Stupeck et al.
patent: 5400190 (1995-03-01), Miura
patent: 5521768 (1996-05-01), Shrinkle et al.
Otomo Yoshihito
Seno Koichi
Mitsumi Electric Co. Ltd.
Ro Bentsu
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