| 摘要 |
PURPOSE:To make magnetic recording and reproducing using a high frequency minute level signal possible by attaching a hybridized head amplifier substrate to an exciting pole of a magnetic head and storing the whole of the magnetic head in a shield case. CONSTITUTION:With respect to a head amplifier substrate 50, resistances, transistors, etc. are hybridized and placed on the surface of a rectangular thin plate-shaped substrate 51 consisting of ceramics or the like to constitute a head amplifier circuit, and a coaxial cable 52 for signal is connected to the lower part in the center of the substrate 51, and one line of this cable 52 is connected to a ground terminal 52a, and the other line is connected to an output part terminal 52b. A power supply terminal 53 is provided slightly right in the lower part, and a power source is connected to it. The rear face of this head amplifier 50 is adhered to the front side face of a block 41 by an adhesive, and finally, a winding 44 is shortened as much as possible and has both end parts connected to prescribed positions of the substrate 51. The whole of the magnetic head is stored in a shield case 60. Thus, jumping-in noise is prevented and the input capacity is reduced to reproduce the minute level signal. |
