Wordline voltage generation circuit and nonvolatile memory...

Details Wordline voltage generation circuit and nonvolatile memory... Wordline voltage generation circuit and nonvolatile memory...

2008-03-18

2008-03-18

Yoha, Connie C. (Department: 2827)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185180, C365S185190

Reexamination Certificate

active

07345923

ABSTRACT:
A wordline voltage generation circuit generates an incremental step pulse voltage and includes a first circuit unit connected to a program voltage, a second circuit unit connected between the first circuit unit and a divided voltage and controlled by a program step code, and a third circuit unit connected between the divided voltage and a ground voltage. An increment of the program voltage is set according to a resistance of the third circuit unit without a change in the program step code. The first circuit unit is symmetrical in structure to the third circuit unit, and an increment of the program voltage is set by controlling a relationship between a resistance of the first circuit unit and a resistance of the third circuit unit, while maintaining a start program voltage or a target program voltage at a fixed value without a change in the program step code.

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