| 摘要 |
PURPOSE:To obtain a tracking device of a signal detector that can make positioning at maximum step of output of a magnetic head by providing a controlling circuit that controls a driving mechanism to stop the detector at a position where output of an information detector becomes maximum. CONSTITUTION:When a display part indicating section 18 designate a track to be sent to a microcomputer 16, a driving circuit 19 rotates a motor 2 based on sequence stored in a ROM 17. When the motor 2 passed a point before designated track, output from a head 4 becomes an envelope signal 28 through a head amplifier 12 and an envelope detector circuit 13, and simple held in a sample and hold circuit 14 by PG pulse from a rotation system 11. The output signal 30 is inputted to a peak detector circuit 15, and a pulse 31 is inputted to the microcomputer 16 at a point where the signal becomes maximum, and the step motor 2 is stopped. |
