Title:
DRIVING APPARATUS FOR MAGNETIC HEAD
Document Type and Number:
Japanese Patent JP3235267
Kind Code:
B2
Abstract:
PURPOSE: To lighten a movable part to obtain a highly reliable apparatus by eliminating a special detecting member for detecting the speed of a magnetic head.
CONSTITUTION: At a time point when only a signal indicating the moving speed of a magnetic head which is generated at a driving coil 7 while a switch SW1 and a switch SW2 are turned off is held by a sample hold circuit 23, a sampling pulse Sc generated at a controlling signal generator 21 is fed to the circuit 23. Only a desired component of the speed signal is extracted at the circuit 23, and the extracted component is amplified by an amplifier 22 and supplied as a speed signal Sd to a subtracter 18 as a subtraction signal. Accordingly, a driving voltage output from the subtracter 18 is in the state restricting well the resonant characteristic of a movable part including the driving coil 7 of a linear direct motor of a voice coil type. Since a detecting member especially for detecting the speed of the magnetic head is eliminated, the movable part is made light and manufactured at a low cost.
Inventors:
Katsuyuki Shuto
Application Number:
JP11205193A
Publication Date:
December 04, 2001
Filing Date:
April 15, 1993
Export Citation:
Assignee:
Victor Company of Japan Ltd.
International Classes:
G11B5/588; (IPC1-7): G11B5/588
Domestic Patent References:
| JP512640A | ||||
| JP4276309A | ||||
| JP3224114A | ||||
| JP142020A |
Attorney, Agent or Firm:
Takao Imama