Nonvolatile semiconductor memory device

Details Nonvolatile semiconductor memory device Nonvolatile semiconductor memory device

2006-08-08

2006-08-08

Mai, Son (Department: 2827)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185110, C365S189090

Reexamination Certificate

active

07088620

ABSTRACT:
A plurality of switches composing a voltage changing switch circuit17are supplied with a plurality of types of voltages, and are provided so as to correspond to a plurality of row decoders2, such that each switch can separately select and output any of the plurality of types of voltages to the corresponding row decoder2. Voltage boost circuits7, 8generate a plurality of types of voltages by boosting a power supply voltage. A regulator circuit9steps down at least one of the plurality of types of voltages generated by the voltage boost circuits7, 8to stabilize a voltage value, and outputs the resultant voltage to each switch. Each row decoder2selects a memory cell by using a voltage outputted from the corresponding switch. Thus, it is possible to reduce a time required for a program/program verify operation, while reducing power consumption.

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