A rotation control circuit comprising, a pickup controller configured to amplify
an error signal detected by a pickup from an optical disk, and to generate both
a low-frequency component in the error signal and a pickup control signal so as
to control the pickup, a memory controller configured to generate a memory address
control signal in synchronization with a frequency generator signal provided by
a disk motor, a memory circuit configured to store the low-frequency component
by using the memory address control signal at a specified timing, a compensation
signal adder configured to add the low-frequency component to the pickup control
signal at another specified timing, and a system controller configured to control
operational timing of the memory controller and the compensation signal adder.