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A novel dynamic memory cell with internal voltage gain

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2 Author(s)
W. K. Luk ; IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA ; R. H. Dennard

A 2T1D dynamic memory cell with two transistors (T) and a gated diode (D) is presented. A gated diode is a two terminal MOS device in which charge is stored when a voltage above the threshold voltage is applied between the gate and the source, and negligible charge is stored otherwise. The gated diode acts as a nonlinear capacitance for voltage boosting, where voltage for 1-data is boosted high and voltage for 0-data stays low, achieving significant voltage gain of the internal stored voltage, higher signal margin, higher current drive and low-voltage memory operation. Details about the gated diode structure, its signal amplification, the memory cell circuits and the array structure, some hardware and test results are presented, followed by comparison to other memory cells and future directions.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:40 ,  Issue: 4 )