Patent ID: 8497670

Claim:
A charge pump regulator circuit that powers a variable load, the charge pump regulator circuit comprising: a voltage controlled oscillator comprising a plurality of inverter stages connected in series in a ring, each of the plurality of inverter stages producing an oscillating signal that is provided to a next one of the plurality of inverter stages, each oscillating signal having a frequency or amplitude that is variable dependent on a variable drive voltage; a plurality of charge pumps, each of the plurality of charge pump being connected to a corresponding one of the plurality of inverter stages to receive the oscillating signal produced by the corresponding inverter stage, the plurality of charge pumps outputting a current at about a voltage level to the variable load; and a feedback loop that provides the variable drive voltage that powers the plurality of inverter stages, a change in the variable drive voltage causing the plurality of inverter stages to change the frequency or the amplitude of the oscillating signal of each of the plurality of inverter stages, which causes a change in a level of the current provided to the variable load by each charge pump of the plurality of charge pumps while attempting to maintain the voltage level thereof.