A New Simple P-MOS Charge Pump for Low Voltage Operations

In this paper a new charge pump is presented. It is based on PMOS pass-transistors with active control of the gate and body voltage. By controlling the gate and the body voltage of the P-MOS pass transistors the voltage drop due to the device threshold is removed; the gate of the pass transistors is driven by a bootstrapping 2 phase clock signal. The charge is pumped from one stage to the other with no threshold voltage drop, and higher output voltage than the conventional charge pumps can be obtained retaining a simple architecture. Computer simulations are provided along with comparison with other charge pump architectures.