Static information storage and retrieval – Systems using particular element – Semiconductive
Patent
1983-12-06
1986-09-30
Fears, Terrell W.
Static information storage and retrieval
Systems using particular element
Semiconductive
365185, 365228, 357 235, G11C 1140
Patent
active
046150200
ABSTRACT:
A nonvolatile dynamic RAM capable of operating in a dynamic RAM mode and a second, nonvolatile mode, is disclosed. The nonvolatile dynamic RAM has a memory cell having a transfer transistor for coupling a storage capacitor having a floating gate to a bit line. The memory cell holds information by the storage of charge in the storage capacitor and also holds information by the storage of charge in the floating gate. This data can be stored and retrieved in a volatile mode and in a nonvolatile mode. The nonvolatile dynamic RAM has a plurality of these memory cells connected to a bit line which, in turn, is connected to a sense amplifier for determining the presence or absence of storage charges in the storage capacitor of a selected memory cell in the first mode, and for determining the presence or absence of storage charges in the floating gate of the selected memory cell in the second mode.
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Chuang Patrick T.
Rinerson Darrell D.
Advanced Micro Devices , Inc.
Chen Davis
Fears Terrell W.
King Patrick T.
Valet Eugene H.
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