Nonvolatile SRAM cells and cell arrays

Details Nonvolatile SRAM cells and cell arrays Nonvolatile SRAM cells and cell arrays

1995-08-17

1996-12-03

Nguyen, Tan T.

Static information storage and retrieval

Floating gate

365 94, 365154, 365104, 36518533, G11C 1600

Patent

active

055815014

ABSTRACT:
A memory cell (400) for storing data on an integrated circuit. The memory cell (400) is static, nonvolatile, and reprogrammable. The layout of the memory cell is compact. In a first state, a logic high output from this memory cell (400) is at about VDD; and in a second state, a logic low output is about VSS. The memory cell (400) of the present invention includes a first programmable memory element (515) and a second programmable memory element (520). First programmable memory element (515) is coupled between VDD (505) and a sensing node (405). Second programmable memory element (520) is coupled between the sensing node (405) and VSS (510). In the first state, first programmable memory element (515) is not programmed, while the second programmable memory element (520) is programmed. In the second state, first programmable memory element (515) is programmed, while second programmable memory element (520) is not programmed. The memory cell (400) may be used to store the configuration information of a programmable logic device (121).

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