Optical recording medium driving apparatus

An optical recording medium driving apparatus for recording and/or reproducing data in/from an optical recording medium, where information can be recorded in plural tracks, based on a light emitted to the tracks of the optical recording medium, said driving apparatus characterized by comprising:

• a two-piece detector for detecting positions of the emitted light;
• two peak-hold circuits for holding peaks of position detected signals outputted from said two-piece detector so as to output the position detected signals;
• two bottom-hold circuits for holding bottoms of the position detected signals so as to output the position detected signals;
• and
• a switching circuit for switching signals based on the output signals from said two peak-hold circuits and two bottom-hold circuits so as to output a signal,
• wherein the signal outputted from said switching circuit is used as a tracking error signal.

An optical recording medium driving apparatus for recording and/or reproducing data in/from an optical recording medium, where information can be recorded in plural tracks, based on a light emitted to the tracks of the optical recording medium, said drive device characterized by comprising:

• a detector for detecting positions of the emitted light;
• a peak-hold circuit for holding a peak of a difference signal of position detected signals outputted from said detector so as to output the difference signal;
• a bottom-hold circuit for holding a bottom of the difference signal so as to output the difference signal;
• and
• a switching circuit for switching the output signals from said peak-hold circuit and bottom-hold circuit so as to output either output signal,
• wherein the signal outputted from switching circuit is used as a tracking error signal.