| 摘要 |
PURPOSE:To improve a recording density by using an imcomplete integration circuit and eliminating the error of position information due to a peak shift. CONSTITUTION:A magnetic head detecting signal A through an amplifier 2 is given to a differention circuit 4 and an incomplete integration circuit 7', both output signals are subtracted and processed, an subtracting signal D is given to a zero cross point detecting circuit 5 and based on the output signal of the circuit, a digital information signal is reproduced. The circuit 7', since the information of a low frequency part is omitted, inputs the signal A to a low frequency information correcting circuit 11 composed of an amplitude control circuit 11, an amplitude control comparator 12 and a filter 13 in order to correct it and adds 10' the output signal to the signal D. Thus, by eliminating the error of the position information due to the peak shift, the recording density can be improved. |
