Title:
MAGNETIC DISK DRIVER
Document Type and Number:
Japanese Patent JPH0991866
Kind Code:
A
Abstract:
To obtain a magnetic disk driver capable of efficiently utilizing a mother board by making a sub-printed board as small as possible.
A main printed board 11 and a sub-printed board 20 are formed on a common mother board 1. On the sub-printed board, a saw-toothed conductor pattern 21 for FG(Frequency Generation) signal generation is formed for rotation detection. A spread angle of this conductor pattern is made substantially in the range of 180 to 270 degrees, and the main printed board corresponding to the virtual spread area of the conductor pattern off the range is cut off.
Inventors:
SHIBATA AKIRA
OTOMO YOSHITO
SENO KOICHI
OTOMO YOSHITO
SENO KOICHI
Application Number:
JP25142495A
Publication Date:
April 04, 1997
Filing Date:
September 28, 1995
Export Citation:
Assignee:
MITSUMI ELECTRIC CO LTD
International Classes:
G11B33/12; G11B19/20; G11B25/04; H05K3/00; (IPC1-7): G11B19/20; G11B25/04; G11B33/12
Attorney, Agent or Firm:
Yosuke Goto (2 outside)