TY  - JOUR
AU  - Freye, Florian
AU  - Lou, Jie
AU  - Bengel, Christopher
AU  - Menzel, Stephan
AU  - Wiefels, Stefan
AU  - Gemmeke, Tobias
TI  - Memristive Devices for Time Domain Compute-in-Memory
JO  - IEEE journal on exploratory solid-state computational devices and circuits
VL  - 8
IS  - 2
SN  - 2329-9231
CY  - New York, NY
PB  - IEEE
M1  - FZJ-2022-05683
SP  - 119 - 127
PY  - 2022
AB  - Analog compute schemes and compute-in-memory (CIM) have emerged in an effort to reduce the increasing power hunger of convolutional neural networks (CNNs), which exceeds the constraints of edge devices. Memristive device types are a relatively new offering with interesting opportunities for unexplored circuit concepts. In this work, the use of memristive devices in cascaded time-domain CIM (TDCIM) is introduced with the primary goal of reducing the size of fully unrolled architectures. The different effects influencing the determinism in memristive devices are outlined together with reliability concerns. Architectures for binary as well as multibit multiply and accumulate (MAC) cells are presented and evaluated. As more involved circuits offer more accurate compute result, a tradeoff between design effort and accuracy comes into the picture. To further evaluate this tradeoff, the impact of variations on overall compute accuracy is discussed. The presented cells reach an energy/OP of 0.23 fJ at a size of 1.2 μm2 for binary and 6.04 fJ at 3.2 μm2 for 4×4 bit MAC operations.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000915312400008
DO  - DOI:10.1109/JXCDC.2022.3217098
UR  - https://juser.fz-juelich.de/record/912510
ER  -