Title:
ディスク駆動装置及びモータドライバ回路
Document Type and Number:
Japanese Patent JP4020100
Kind Code:
B2
Abstract:
A motor driver circuit according to the present invention comprises an edge signal generation means for generating an edge signal indicating the timing of phase-switching according to the values of a plurality voltages induced when driving the motor and a drive voltage control means for controlling the highest value of the drive voltage for driving the motor according to the edge signal. The drive voltage control means includes a first drive voltage control means for controlling the highest value of the drive voltage before the timing of phase-switching and a second drive voltage control means for controlling the highest value of the drive voltage after the timing of phase-switching. With this arrangement, it is possible to realize soft switching control while the motor is driven to rotate at high speed and reduce the noise due to the motor being driven to rotate.
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Inventors:
Takayama Seiryu
Koya Koya
Koya Koya
Application Number:
JP2004176149A
Publication Date:
December 12, 2007
Filing Date:
June 14, 2004
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G11B19/28; H02P1/54; H02P6/06; H02P6/08; H02P6/18; H02P6/182; H02P6/21
Domestic Patent References:
| JP2002369575A | ||||
| JP2000287477A |
Attorney, Agent or Firm:
Akira Koike
Eiichi Tamura
Seiji Iga
Eiichi Tamura
Seiji Iga