Integrated multivalue voltage-to-voltage converter

A charge pump circuit has been developed. It can give high voltage pulses for on-chip programming EEPROM. The charge pump circuit uses a symmetrical structure and is designed to offer two possible output voltages, power supply or alternatively triple power supply, which is needed for the memory cells we use. The circuit has been realized in a 1.2 /spl mu/m CMOS process and the measure results and discussions have been given.