METHODS AND APPARATUS TO LOCK A PHASE LOCK LOOP TO A MOTOR

摘要

Methods and apparatus to lock a phase lock loop to a spindle motor (102) are disclosed. An example controller (104) comprises a counter (108) to determine a period of an operating signal received from a motor, an oscillator (114) to generate a control signal based on an input signal, and a DRC controller (110) to generate the input signal based on the period, wherein the input signal causes the oscillator to generate the control signal having the same phase as the operating signal.