Patent ID: 7554845

Claim:
An Electrically Erasable and Programmable Read Only Memory (EEPROM) cell comprising: a writing unit including a flash cell Metal Oxide Semiconductor (MOS) for receiving a gate selection signal from outside via a gate and a drain selection signal from the outside via a drain, and writing one bit data, and a high-voltage MOS whose source is connected to a source of the flash cell MOS to have a symmetrical structure with the flash cell MOS for receiving the gate selection signal via a gate; and a sensing unit including a first sensing MOS having a source connected to a power supply voltage, a gate connected to a drain of a second sensing MOS and a drain connected to the drain of the flash cell MOS, and the second sensing MOS having a source connected to the power supply voltage, a gate connected to the drain of the first sensing MOS and the drain connected to the drain of the high-voltage MOS, wherein a gate voltage of the first sensing MOS is provided as a positive output signal and a gate voltage of the second sensing MOS is outputted as a negative output signal.