Clock generating based on a reference signal included in the digital input data of a digital broadcasting receiver

摘要

When an STB is powered off when it is not used (when it is changed to the sleep mode) for the purpose of power-saving, a difference in a subtracter immediately therebefore is held by a control circuit and an oscillation circuit is controlled on the basis of the difference, thereby performing reserved processing at a correct time even when the STB is in the sleep mode.