Novel Dual Rail High Voltage Generators for Embedded Flash Memories

Novel high voltage generator for embedded flash memories are presented, employing dual rail architecture. Two cross-coupled charge transfer paths are employed in this circuit to reduce capacitance sizes and to achieve faster rising time. This generator produces a high voltage above 20V within 9¿s using a 2V external power supply, which provides faster high voltage response than conventional methods and yields a high circuit density.