| 摘要 |
A charge pump circuit operates from a voltage provided on an input rail at a first potential relative to a reference potential rail and that provides second and third potentials relative to the reference potential rail on first and second output rails, respectively. The charge pump circuit includes first, second and third charge reservoir capacitors, an oscillator and control logic circuit for providing timing control signals, and a switch network responsive to the timing control signals for coupling the first, second and third capacitors in a plurality of configurations. In transitioning between these configurations, the switch network provides for the decoupling of the first capacitor from between the input rail and the reference potential rail prior to enabling the second configuration and from between the second output rail and the input rail prior to enabling the first configuration, and for the decoupling of the second capacitor from between the first output rail and the reference potential rail prior to enabling the third configuration and from between the reference potential rail and the second output rail prior to enabling the first configuration.
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