Mitsubishi Denki Kabushiki Kaisha

Yasuhide Kasagi

Naoto Sugawara

Masaru Nishimura

Keiichi Nishikawa

Yuzou Maruta

A magnetic recording and reproducing circuit comprises a recording and reproducing head including a recording coil; an erasing head disposed upstream of the recording and reproducing head and including an erasing coil; a flip-flop which receives pulse-shaped record data and outputs an output signal which reverses the state in accordance with the pulses of the recording data; a delay circuit which receives the output of the flip-flop and delays such output by a predetermined period of time; a record driver which receives the output of the delay circuit for causing a recording current to flow through the recording coil of the recording and reproducing head; and an erasing circuit for causing an erasing current to flow through the erasing coil of the erasing head at the time of recording.

Digital magnetic recording and reproducing circuit for suppressing

Crosstalk prevention means or short-circuit means is connected in parallel to an erasing coil for erasing part of data prior to recording the data by a read/write coil, whereby a cancelling magnetic flux for erasing a crosstalk magnetic flux is generated to improved an S/N ratio.

Growing community of inventors

Fukushima, Japan

Yasuhide Kasagi