Patent ID: 7965067
Filing Date: 2011-06-21
Classification: H02M

Abstract:
1. An apparatus comprising: an error amplifier that amplifies the difference between a reference voltage and a feedback voltage; a first variable impedance circuit coupled to the error amplifier, wherein the variable impedance circuit receives a control voltage from the error amplifier; a charge pump coupled to the variable impedance, wherein the charge pump receives an input voltage from the variable impedance, and wherein the charge pump outputs an output voltage and an output current; and a Miller compensator coupled to the charge pump and to the first variable impedance circuit, wherein the Miller compensator receives the output voltage and output current, and wherein the Miller compensator outputs the feedback voltage, and wherein the Miller compensator adjusts the control voltage, and wherein the Miller compensator has a zero-pole that is proportional to a power of the output current, and wherein the Miller compensator includes: