TRACK FOLLOWING SERVO SYSTEM

摘要

A servo system for accurately positioning a transducer relative to a recording medium by detecting equal amplitude signals from two adjacent servo tracks. The servo tracks are prerecorded on the medium and have a frequency difference which is small in comparison to the frequency of the signals themselves and by multiplying the resultant servo signal with signals at the frequencies contained in the servo signal, a resultant signal is generated which is suitable for controlling the servo system.