MOS capacitor and charge pump with MOS capacitor

摘要

A MOS capacitor in a charge pump includes a MOS device with at least one body bias region and a device body of a same conductivity type for providing maximum capacitance over a wide voltage range. The MOS capacitor also includes a gate forming a first terminal of the MOS capacitor, and the at least one body bias region forms a second terminal of the MOS capacitor. The MOS capacitor further includes a multiple-well structure formed with the device body and a deep well in a substrate for enhanced noise immunity.