Static information storage and retrieval – Floating gate – Particular connection
Patent
1997-05-02
1999-07-06
Nguyen, Tan T.
Static information storage and retrieval
Floating gate
Particular connection
36518529, 36518526, G11C 1600
Patent
active
059205032
ABSTRACT:
A flash memory with a novel bitline and sourceline decoder includes a first bank of flash transistors forming a plurality of rows and a plurality of columns, and having wordlines, bitlines and a first sourceline. A second bank of flash transistors forms a plurality of rows and a plurality of columns, and has wordlines, bitlines and a second sourceline. A wordline decoder is coupled to the wordlines and configured to receive a wordline address signal and to decode the wordline address signal to select a wordline. A bitline and sourceline decoder is coupled to the bitlines and sourcelines and configured to receive a bitline address signal and to decode the bitline address signal to select predetermined bitlines and sourcelines. The bitline and sourceline decoder includes a latch coupled to the bitlines, the first sourceline and the second sourceline and configured to latch selected bitlines and sourcelines to selectively provide erase voltages on the selected bitlines and sourcelines. As a result of the novel memory architecture, a flexible number of bytes can be selected for erasure. The selected number of bytes can range from one byte to 64K bytes or more. Advantages of the invention include reduced erase/write cycle time and an improved expected lifetime of the flash memory due to reduced stress on the flash transistors within the flash memory.
REFERENCES:
patent: 5245572 (1993-09-01), Kosonocky et al.
patent: 5327384 (1994-07-01), Ninomiya
patent: 5414669 (1995-05-01), Tedrow et al.
patent: 5541886 (1996-07-01), Hasbun
patent: 5555521 (1996-09-01), Hamada et al.
Hsu Fu-Chang
Lee Peter W.
Tsao Hsing-Ya
Aplus Flash Technology Inc.
Nguyen Tan T.
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