International Business Machines Corporation

Imec Vzw

Jonas Doevenspeck

Takashi Ando

Soon-Cheon Seo

Youngseok Kim

Maarten Rosmeulen

Stefan Cosemans

Seyoung Kim

Example embodiments relate to matrix-vector multiplications based on charge-summing memory cell strings. An example in-memory compute device for performing analog multiply-and-accumulate operations on a set of data inputs and a set of weight inputs includes a string of serially connected memory cells formed over a semiconductor channel structure, a source junction controllably connectible to one end of the string of memory cells via a string select switch, a readout circuit including a sense node controllably connectible to one end of the string of memory cells via a charge transfer switch, and control circuitry. The control circuitry is configured to apply pass mode signals, data input signals, and stop signals sequentially according to each memory cell's position along a string. The control circuitry is also configured to enable the string select switch and the charge transfer switch.

Matrix-vector multiplications based on charge-summing memory cell strings

A semiconductor device comprises a plurality of resistive memory element structures, at least a subset of the plurality of resistive memory element structures being associated with random analog resistive states. The random analog resistive states of the subset of the plurality of resistive memory element structures provide a unique identification of the semiconductor device.

Semiconductor device identification using preformed resistive memory

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Herent, Belgium

Jonas Doevenspeck