| 摘要 |
PURPOSE:To attain the amplitude compensation and the phase compensation in a wide scope by providing a slimming circuit to execute the compensation at the high frequency side of a reproducing signal, a resonator to execute the compensation at the low frequency side of the reproducing signal and a shifter to execute the correction of a frequency-compensated signal. CONSTITUTION:By setting a resonancing point fr at the place lower than the lower limit fmin of a using band, an amplitude is compensated, comes to be flat even at the low frequency side and a flat characteristic can be obtained from the low frequency to the high frequency finally. The amplitude is constant at all frequency bands, fc (a point to come to be 90 deg. in the phase characteristic of a shifter) is set and adjusted higher than the resonancing point ff, and the characteristic is obtained in which the amplitude is loaded onto a straight line to pass through 90 deg. in the using characteristic. Further, when the characteristic 6 of a head is added, the amplitude is loaded onto the straight line to pass through 180 deg. as a general phase characteristic. thus, the compensation at the low frequency can be executed and as such a result, the compensation in the scope wider than the previous one can be executed.
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