A circuit for speeding up the pre-programming of floating gate storage transistors such as FLASH EPROMS, and particularly speeding up the pre-programming of a block or array of floating gate storage transistors includes a controllable voltage source that supplies gate programming potential...http://www.google.de/patents/US5821909?utm_source=gb-gplus-sharePatent US5821909 - Fast flash EPROM programming and pre-programming circuit design