A system and method are disclosed for providing EEPROM devices that
combine the high endurance features of complex and expensive EEPROM
devices and the low manufacturing costs of CMOS compatible EEPROM
devices. A memory cell of the invention comprises a control capacitor, an
erase capacitor, and a program capacitor, each of which comprises an NMOS
transistor. The gates of the three NMOS transistors are connected
together to form a floating gate. The drain of the NMOS transistor of the
program capacitor is separately connected so that the program capacitor
can also serve as a read transistor. A memory cell of the invention can
be programmed or erased in an array of memory cells without disturbing
the other memory cells in the array.