Abstract: A charge pump is connected to receive a supply voltage and a clock signal and generate an output voltage. The charge pump is connected to the supply voltage through a transistor whose gate voltage is set by a regulation voltage determined by feedback from the output voltage. The current supplied to the charge pump through this transistor is mirrored in a section that generates the clock signal, where the mirrored current is used by a current controller oscillator. This allows the pump's clock frequency to linearly track the load current, improving the pump's efficiency.

Abstract: A charge pump design suitable for generating high voltages employs multiple low voltage capacitors and low voltage transfer switches, with a limited number of high voltage devices. This is designed such that during a first clock phase, capacitors are each connected between an input voltage and ground and, during a second clock phase all the capacitors are connected in series to generate the required voltage. Both the switches (PMOS) and as well the capacitors are realized as low voltage devices. The ability to use low voltage devices can significantly reduce the area and also a reduction in current consumption relative to the usual high voltage charge pumps which uses high voltage devices.

Abstract: A charge pump design suitable for generating high voltages employs multiple low voltage capacitors and low voltage transfer switches, with a limited number of high voltage devices. This is designed such that during a first clock phase, capacitors are each connected between an input voltage and ground and, during a second clock phase all the capacitors are connected in series to generate the required voltage. Both the switches (PMOS) and as well the capacitors are realized as low voltage devices. The ability to use low voltage devices can significantly reduce the area and also a reduction in current consumption relative to the usual high voltage charge pumps which uses high voltage devices.

Abstract: Methods and systems for generating voltages greater than a supply voltage are described. A charge pump system may generate a boosted output voltage greater than the supply voltage using one or more charge pump stages that are arranged in series between the supply voltage and the boosted output voltage. The charge pump system may include clock freezing circuitry that eliminates glitches in clock signals used for driving the one or more charge pump stages. In one example, the clock freezing circuitry may freeze a clock signal that drives a charge pump stage (i.e., prevent the clock signal from switching) when a feedback flag of the charge pump system is in a disable state (e.g., is low). When the feedback flag is in an enable state (e.g., is high), then the clock signal may toggle between a high state and a low state.

Abstract: Techniques are presented for improving the efficiencies of multi-stage charge pumps by reducing the amount of voltage lost across the inter-stage transfer switches of the pump through use a selective body bias. The voltage level from both branches of one stage is each supplied though a corresponding diode to the bulk connection of the transfer switch after the subsequent stage in both branches. This arrangement results in each stage providing a largely uniform amount of gain, without the usual increase of voltage drop with increasing numbers of stages.

Abstract: A charge pump is connected to receive a supply voltage and a clock signal and generate an output voltage. The charge pump is connected to the supply voltage through a transistor whose gate voltage is set by a regulation voltage determined by feedback from the output voltage. The current supplied to the charge pump through this transistor is mirrored in a section that generates the dock signal, where the mirrored current is used by a current controller oscillator. This allows the pump's clock frequency to linearly track the load current, improving the pump's efficiency.

Abstract: Methods and systems for generating voltages greater than a supply voltage are described. In some embodiments, a charge pump system may generate a boosted output voltage greater than the supply voltage using one or more charge pump stages that are arranged in series between the supply voltage and the boosted output voltage. A charge pump stage of the one or more charge pump stages may include a plurality of boosting capacitors that are arranged in series and charged to a charging voltage during a charging phase. During the charging phase, each boosting capacitor of the plurality of boosting capacitors may be charged to a fraction of the charging voltage applied across all of the plurality of boosting capacitors. After the charging phase, the plurality of boosting capacitors may be arranged in parallel and each boosting capacitor of the plurality of boosting capacitors may be boosted during a boosting phase.