Nonvolatile semiconductor memory device and voltage...

Details Nonvolatile semiconductor memory device and voltage... Nonvolatile semiconductor memory device and voltage...

2008-09-23

2008-09-23

Dinh, Son (Department: 2824)

Static information storage and retrieval

Floating gate

Particular biasing

C365S189090, C365S204000, C257S299000, C375S374000, C327S144000, C327S148000

Reexamination Certificate

active

11262759

ABSTRACT:
A nonvolatile semiconductor memory device includes a memory cell array of a plurality of memory cells; and a voltage generating circuit for generating a programming voltage to be applied to the memory cells. The voltage generating circuit includes a first voltage generating unit for generating a negative voltage through a first charge pump; and a second voltage generating unit for generating a positive voltage through a second charge pump. During an accelerated programming operation, the first voltage generating unit increases a pumping efficiency of the first charge pump using an external power supply voltage, and the second voltage generating unit directly outputs the external power supply voltage.

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