An information recording and reproducing apparatus having a high track density,
a high recording density in each of the tracks, and a short seeking time. In a
seeking operation, a control circuit performs a calculation required for the seeking
operation and then sets, to (f=fs), a drive pulse frequency f for a tracking control
to be supplied to a piezoelectric element based on the calculation result. A drive
circuit outputs a drive pulse of the frequency f corresponding to the input drive
pulse to an actuator, so that a recording and reproducing head is moved near a
target track. In a following operation, the control circuit performs a calculation
required for following operation and then sets, to (f=ft, wherein fsft),
the drive pulse frequency f to be supplied to the piezoelectric element based on
the calculation result.
