Static information storage and retrieval – Analog storage systems
Patent
1993-11-08
1995-07-04
Popek, Joseph A.
Static information storage and retrieval
Analog storage systems
365149, 365182, 365207, 365185, 257312, G11C 2700
Patent
active
054306701
ABSTRACT:
A differential analog memory cell provides output signals governed by precisely adjustable voltage levels having minimal drift. The memory cell comprises a pair of differentially connected floating gate MOSFETs, each MOSFET having its source connected to a common current source and its drain connected to one leg of a current mirror. The floating gate of each MOSFET is connected to one electrode of a tunneling capacitor and one electrode of a coupling capacitor. Voltages applied to the other electrode of the tunneling capacitor inject charges onto the corresponding floating gate, the voltage of which is determined by the size of the coupling capacitor. Output voltages taken from the drains of the floating gate MOSFETs can be precisely adjusted up or down by applying single polarity voltage pulses to one or the other injector nodes.
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Elantec, Inc.
Nguyen Tan
Novakoski Leo V.
Popek Joseph A.
Smith Albert C.
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