Write precompensation circuit for accurate pulse positioning on magnetic media

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Write precompensation circuit for accurate pulse positioning on magnetic media

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The write precompensation circuit presented is part of an integrated read channel device used in magnetic disk drives. The circuit employs the clock phases available in the cascaded stages of a ring oscillator to generate pulses which have precise programmable delays.

Inspec keywords: magnetic disc storage; delay circuits; pulse circuits; compensation

Other keywords: pulse generator; programmable delay; clock phase; integrated read channel device; magnetic disk drive; cascaded ring oscillator; pulse positioning; write precompensation circuit

Subjects: Storage on moving magnetic media; Pulse circuits; Magnetic recording


    1. 1)
      • Machado, M.: `Synchronous read channels', course notes, 1993.
    2. 2)
      • B. Kim , D.N. Helman , P.R. Gray . A 30 MHz hybrid analog/digital clock recovery circuit in 2 µm CMOS. IEEE J. Solid State Circuits , 6 , 1385 - 1394

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