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Magnetic recording system and method

  • US 4,628,374 A
  • Filed: 07/29/1985
  • Issued: 12/09/1986
  • Est. Priority Date: 08/18/1981
  • Status: Expired due to Fees
First Claim
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1. A transducer system comprising:

  • a magnetic transducer head including a magnetic core having a coupling region at a record medium path for coupling of the transducer head with a channel of a magnetic record medium moving along said record medium path,record medium drive means for moving a magnetic record medium along said record medium path during recording of a signal on a channel of the record medium, andrecording means comprising current conductor means coupling with said magnetic core for producing an effective recording field at said coupling region in accordance with a signal to be recorded, such that the signal is recorded along a channel of the record medium,said recording means supplying an alternating polarity pulse electric current to said current conductor means with each successive pulse having alternately opposite polarity and with the pulses having a constant amplitude and having substantially a given pulse repetition rate with respect to pulses of the same polarity, and having a discontinuous pulse waveform with relatively short duration pulses of alternate polarity and with substantially zero amplitude intervals of relatively long duration between each pair of the successive pulses of alternate polarity,said magnetic transducer head having an effective frequency response extending at least to the third harmonic of said pulse repetition rate but having a recording resolution so as to be incapable of recording effectively the fundamental frequency corresponding to said pulse repetition rate.

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