Title:
MAGNETIC DISK DEVICE
Document Type and Number:
Japanese Patent JPH01208776
Kind Code:
A
Abstract:
PURPOSE:To set an antiresonance frequency to a frequency whose mechanical resonance frequency is the closest to that of the antiresonance frequency so as to set a compensation circuit to the optimum state by detecting the mechanical resonance frequency with a compensation controlling means and changing the antiresonance frequency of a band-block filter. CONSTITUTION:A compensation controlling means is constituted of a resonance frequency detector 6 connected to a compensation circuit 2A and head positioning mechanism 5 and a compensation circuit setter 7, whose input side is connected with the detector 6 and output side is connected with the circuit 2A. Then, by detecting a mechanical resonance frequency in accordance with the outputs of the compensation circuit 2A which compensates the gain of the band containing the mechanical resonance frequency of a magnetic head positioning signal and the positioning mechanism 5 with positions a magnetic head in accordance with the positioning signal from the compensation circuit 2A, the band of the circuit 2 is changed. Therefore, the resonance frequency can be set to a frequency, whose mechanical resonance frequency is the closest to that of the resonance frequency, and the compensation circuit 2A can be set to the optimum state.
Inventors:
MAEKAWA TOSHIAKI
Application Number:
JP3264588A
Publication Date:
August 22, 1989
Filing Date:
February 17, 1988
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G11B21/10; G05D3/12; (IPC1-7): G05D3/12; G11B21/10
Attorney, Agent or Firm:
Mitsuteru Soga (4 outside)