资料介绍
—A charge pump cell is used to make a voltage doubler
using improved serial switches. A complete power efficiency
theory is presented which fits the measurements. The importance
of capacitors is shown with plots of power efficiency versus load
and stray capacitors. Several problems arising at low voltage
or high frequency are developed and some optimizations are
presented. The substrate current is totally suppressed by the
technique of bulk commutation. A power efficiency of 95% has
been reached using external capacitors. A fully integrated charge
pump is also presented and shows a maximum power efficiency
of 75%.410 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 33, NO. 3, MARCH 1998
A High-Efciency CMOS Voltage Doubler
Pierre Favrat, Associate Member, IEEE, Philippe Deval, and Michel J. Declercq, Senior Member, IEEE
Abstract―A charge pump cell is used to make a voltage doubler
using improved serial switches. A complete power efciency
theory is presented which ts the measurements. The importance
of capacitors is shown with plots of power efciency versus load
and stray capacitors. Several problems arising at low voltage
or high frequency are developed and some optimizations are
presented. The substrate current is totally suppressed by the
technique of bulk commutation. A power efciency of 95% h
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