Design of a High Performance Charge Pump by Taking PMOS Transistors as Switch Transistors

A new charge pump was presented.The threshold voltage loss was avoided by taking PMOS transistors as switch transistors.By a resistor feedback loop,the output voltage was regulated via controlling the oscillator;when charge pump didn′t work,every sub-circuit was cut off to realize low power.Simulation results showed that the new charge pumps had high performance,shorter start up time and small voltage ripple.This circuit had been realized in the SMIC 0.18 μm CMOS technology and reached the design request.The output voltage was steady-going and had a strong drive-power.It was actually used in 1 M EEPROM chip normally.