Stylus position detecting apparatus

A stylus position detecting apparatus for controlling an arm servo system of a disc player in which a high frequency signal is led from a high frequency signal source to a stylus electrode and a change of capacitance between said stylus electrode and a disc is taken out in the form of an information signal, said stylus position detecting apparatus comprising:

• detecting means positioned at the both sides of a conductor connecting the output of said high frequency signal source to said stylus electrode for detecting leakage components of the high frequency signal flowing through said conductor;
• means for supplying a reference potential;
• a detector circuit which detects a signal detected by said detecting means to positive and negative directions with respect to said reference potential;
• and
• adding means for adding two voltages obtained by the detections to said positive and negative directions to produce a stylus position detecting signal.