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A switched capacitor charge pump applicable to phase change memory(PCM) is presented, which can provide a extra low ripple DC output of 5V with a maximum load condition of 10mA. For low output ripple and high power effiency, a novel operation mode is used. Compared with the conventional switched capacitor charge pump, the flying capacitor of the proposed charge pump is charged to Vo-VDD instead of...
A charge sharing clock scheme is proposed to feed a 5-stage double charge pump circuit. By reusing the charges in charging or discharging the parasitic capacitance during the pumping process, dynamic power loss is able to be reduced by nearly a half. Under 1V supply, simulation results show a maximum 10% efficiency increase, and the ripple noise is also reduced by a half comparing to the conventional...
A delay-locked loop of multi-band selector with wide-locking range and low power dissipation is presented. The architecture of the proposed delay-locked loop consists of phase frequency detector, charge pump, band selector, multi-control delay line, and start-up circuit. The multi-band selector is used to extend operation frequency of delay-locked loop by switching the multi-control delay line. The...
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