Patent ID: 7353124

Claim:
An apparatus for providing a reference voltage for regulating voltage levels, the apparatus comprising: a first voltage generation system configured to receive a first control signal and output a calibration voltage; a voltage adjustment system configured to receive the calibration voltage and a first reference voltage and output a second control signal; a second voltage generation system configured to receive the second control signal and output a second reference voltage; wherein the voltage adjustment system includes a latch system configured to receive a third control signal and a fourth control signal and output the first control signal; wherein the first control signal is associated with a first state if the third control signal is associated with a calibration and the fourth control signal is free from being associated with a completion of a voltage adjustment by the voltage adjustment system; wherein the first control signal is associated with a second state if the third control signal is free from being associated with the calibration or the fourth control signal is associated with the completion of the voltage adjustment by the voltage adjustment system; wherein the first state is associated with an active state of the first voltage generation system and the second state is associated with an inactive state of the first voltage generation system; wherein the voltage adjustment system is configured to process information associated with the calibration voltage and the first reference voltage and determine the second control signal based on at least information associated with the calibration voltage and the first reference voltage.