| 摘要 |
PURPOSE:To facilitate an easy control for the position of a stylus type information reproducer, by providing an impedance element whose output impedance varies in response to the extent of displacement of a recorded information reading pickup in the radius direction of a disk. CONSTITUTION:An information reproducer gives a tracking control to a cantilever 3 of a cartridge to trace a track while shifting linearly a pickup lock 5 toward the radius of a disk 1 and then reads and reproduces the information. In response to the extent of displacement of the lock 5, the resistance value between output terminals (b) and (c), i.e., the output impedance of a variable resistor 15 varies. Therefore this resistance value varies in accordance with the track position (track radius) which is traced by a stylus 2 of the pickup to the center position of the disk 1. In such a way, a system control is possible for a pickup block 5 to perform a control for loading positioning of a stylus, etc. |
