FREQUENCY DIVIDER, PHASE LOCKED LOOP CIRCUIT THEREOF AND METHOD FOR CONTROLLING PHASE LOCKED LOOP CIRCUIT

摘要

PURPOSE: A frequency divider, a phase synchronizing loop circuit including the same, and a control method thereof are provided to generate various output frequencies. CONSTITUTION: A first divider(151) divides signals from a voltage control oscillator. A second divider(153) divides signals from the first divider. A selector(155) selects and outputs one of the signals of the first divider or the second divider. A prescaler(157) divides the signals from the first divider according to a control signal. A third divider(159) divides and outputs the signals from the prescaler.