JPS6489088A - Carriage driving/control circuit for magnetic disk device - Google Patents
Carriage driving/control circuit for magnetic disk deviceInfo
- Publication number
- JPS6489088A JPS6489088A JP24600287A JP24600287A JPS6489088A JP S6489088 A JPS6489088 A JP S6489088A JP 24600287 A JP24600287 A JP 24600287A JP 24600287 A JP24600287 A JP 24600287A JP S6489088 A JPS6489088 A JP S6489088A
- Authority
- JP
- Japan
- Prior art keywords
- driving
- voice coil
- coil motor
- respective transistors
- collector loss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To suppress the collector loss of a transistor used in a driving circuit for driving a voice coil motor and to prevent the increase of a calorific value by operating the respective transistors of a motor driving means by a first driving voltage and a second driving voltage under a saturated state. CONSTITUTION:A positional error between a magnetic head and a target track is obtained according to a comparison 25 between a position signal Vi and a reference signal Vr to pass the driving current I of the time and the direction according to this positional error to the voice coil motor 13. As the driving system for the voice coil motor 13, a pulse duration modulating system is used, thereby, the driving current I decided based on preset driving voltages Vd1, Vd2 is passed to the voice coil motor 13. In such a case, the level of the driving voltages Vd1, Vd2 is preset so as to operated the respective transistors of a VCM driving circuit 20 under the saturated state, thereby, the collector loss of the respective transistors can be suppressed. Thereby, the increase in the calorific value due to the collector loss of the transistor of the VCM driving circuit 20 is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24600287A JPS6489088A (en) | 1987-09-30 | 1987-09-30 | Carriage driving/control circuit for magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24600287A JPS6489088A (en) | 1987-09-30 | 1987-09-30 | Carriage driving/control circuit for magnetic disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6489088A true JPS6489088A (en) | 1989-04-03 |
Family
ID=17142003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24600287A Pending JPS6489088A (en) | 1987-09-30 | 1987-09-30 | Carriage driving/control circuit for magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6489088A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5323368A (en) * | 1991-12-26 | 1994-06-21 | International Business Machines Corporation | Track crossing apparatus and method using the difference between pick-up velocity and a predetermined velocity |
| US5608588A (en) * | 1992-05-28 | 1997-03-04 | International Business Machines Corporation | Method for controlling digital closed servo loop system and disk storage apparatus using the system |
-
1987
- 1987-09-30 JP JP24600287A patent/JPS6489088A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5323368A (en) * | 1991-12-26 | 1994-06-21 | International Business Machines Corporation | Track crossing apparatus and method using the difference between pick-up velocity and a predetermined velocity |
| US5608588A (en) * | 1992-05-28 | 1997-03-04 | International Business Machines Corporation | Method for controlling digital closed servo loop system and disk storage apparatus using the system |
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