Patent ID: 6977558
Filing Date: 2005-12-20
Classification: H03L

Abstract:
1. A phase-locked loop, comprising: a phase detector, a charge pump coupled to the phase detector, a low pass filter coupled to the charge pump, and a voltage control oscillator coupled to the charge pump and a supply voltage, wherein the low pass filter inputs a control voltage to the voltage controlled oscillator for generation of an output clock; and a voltage regulator coupled to an output of the low pass filter, the voltage regulator for sensing the control voltage during normal operation of the phase-locked loop, and for dynamically adjusting the supply voltage in response to the control voltage, wherein the voltage control regulator uses the control voltage as an error signal that is proportionate to process/temperature drift occurring in the phases locked loop such that the phase-locked loop maintains the control voltage within a predefined range of a reference voltage regulator comprising,