| 摘要 |
PURPOSE:To record and reproduce assuredly the information up to a high range with use of a flat amplifier which is usually used by setting the finite value for thickness of a magnetic pole and at the same time setting the thickness of said magnetic pole at 1/2 inlet of the waveform of a compensated frequency region to eliminate the deterioration of the high range characteristics. CONSTITUTION:The thickness of magnetic poles 5a and 5b are set at the inlet of the waveform of a compensated region where the improvement of frequency characteristics is desired and also at 1/2 inlet of the waveform of the output characteristics compensated region. As a result, the output characteristics of said compensated region can be flattened up to a high region. This eliminate the need for providing the high range compensating characteristics to an amplifier systme for the flattening purpose like a conventional case. Thus it is possible to record and reproduce assuredly the signals up to a high range with use of a flat amplifier. |
