Charge pump apparatus.

摘要

A charge pump circuit is provided comprising a MOS capacitor, a capacitor ("series capacitor") connected in series, a MOSFET diode, and a voltage clamp connected to the common node of the MOS capacitor and the series capacitor. A number of these charge pump circuits may be cascaded to form a multi-stage charge pump circuit. Each charge pump circuit may attain output voltage higher than the oxide breakdown voltage of each individual MOS capacitor. This charge pump circuit can also operate under low voltage power supply conditions. <IMAGE>