Patents Examined by J. Clark
  • Magnetic recording apparatus
    Patent number: 5307214
    Abstract: A magnetic recording apparatus for recording information on a magnetic recording medium. A circuit for generates a recording current pulse train and supplies the pulse train to a magnetic head. The last pulse of the recording current pulse train dampled waveform. A ripple current is superposed on the damped waveform.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: April 26, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Kanji Kawakami, Yoshiakira Karakama, Masayuki Takagi, Takayoshi Ohtsu, Hisayasu Honma, Tetsuo Kobayashi, Yutaka Sugita, Katsuya Mitsuoka