Patent ID: 7570104

Claim:
A charge pump circuit control system, comprising: a charge pump circuit for generating an output voltage; a level detector for detecting the output voltage variation and thereby generating a control signal; and a ring oscillator for generating a plurality of clock signals according to the control signal, comprising: a latching node; a plurality of serial connected inverters for generating a first output signal and a second output signal wherein a first terminal of the plurality of serial connected inverters is coupled to the latching node and a second terminal of the plurality of serial connected inverters is to generate a feedback signal; a latch coupled to the latching node for performing latching operation on a voltage signal of the latching node according to the control signal and the feedback signal; and a logic gate unit for generating the plurality of clock signals according to the first output signal and the second output signal; wherein the charge pump circuit generates the output signal according to the plurality of clock signals and every enabling interval of a first clock signal in the plurality of clock signals is the same.