Static information storage and retrieval – Powering
Patent
1992-10-22
1994-01-25
Fears, Terrell W.
Static information storage and retrieval
Powering
365227, 365900, G11C 1300
Patent
active
052821706
ABSTRACT:
A negative power supply for generating and supplying a regulated negative potential to control gates of selected memory cells via wordlines in an array of flash EEPROM memory cells during flash erasure includes charge pumping means (12) formed of a plurality of charge pump stages (401-404) for generating a high negative voltage, and cancellation means coupled to each stage of the charge pump means for effectively canceling out threshold voltage drops in the charge pump means. A regulator means (16) responsive to the high negative voltage and a reference potential is provided for generating the regulated negative potential so that it is independent of an external supply potential (VCC).
REFERENCES:
patent: 5168466 (1992-12-01), Kuo et al.
Chang Chung K.
Chen Johnny C.
Cleveland Lee E.
Montalvo Antonio
Van Buskirk Michael A.
Advanced Micro Devices , Inc.
Chin Davis
Fears Terrell W.
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