Memory cell with volatile and non-volatile storage
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United States of America Patent
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Aug 25, 2015
Grant Date -
Sep 18, 2014
app pub date -
Jun 14, 2012
filing date -
Jun 15, 2011
priority date (Note) -
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Abstract
The invention concerns a non-volatile memory element comprising: first and second transistors (106, 108) forming an inverter (104) coupled between a first storage node (112) and an output (110) of the memory element; a third transistor (116) coupled between the first storage node (112) and a first supply voltage (GND, VDD) and comprising a control terminal coupled to said output; a first resistance switching element (102) coupled in series with said third transistor and programmed to have one of first and second resistances (Rmin, Rmax) representing a non-volatile data bit; a fourth transistor (118) coupled between said storage node (112) a second supply voltage (VDD, GND); and control circuitry (130) adapted to activate said third transistor at the start of a transfer phase of said non-volatile data bit to said storage node, and to control said fourth transistor to couple said storage node to said second supply voltage during said transfer phase.
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