MAGNETIC RECORDING MEDIUM

PURPOSE:To increase greatly the recording density of a data recorder/reproducer, by using a staircase wave generating circuit to convert a digital data into a staircase wave having a modulated period and then to record it to a recording medium. CONSTITUTION:The staircase waves of different periods in accordance with 1 or 0 of the signal at a terminal Q which is obtained by latching a data signal (a) by a latching circuit 11. In other words, the half period T of the staircase wave is short and long when the data (a) is set at 0 and 1 respectively. Then the staircase wave is recorded on a magnetic tape 3 by a tape recorder 7. In the reproduction mode, an output signal (c) is supplied to a buffer 14 of a comparator 5. At the same time, the top or bottom point of the signal (c) is held by the values of a diode and a capacitor. Then the amplitude center potential of the signal emerges at a capacitor C4 through a resistance. An operational amplifier 15 compares the signal with its amplitude center to extract a square wave (d) which has a short period to a signal 0 and a long period to a signal 1 respectively. Thus, the recording density is greatly increased.