TY - GEN
T1 - Impact of parasitic wire resistance on accuracy and size of resistive crossbars
AU - Zhang, Lei
AU - Borggreve, David
AU - Vanselow, Frank
AU - Brederlow, Ralf
N1 - Publisher Copyright:
© 2021 IEEE
PY - 2021
Y1 - 2021
N2 - The size of crossbar-like resistive multiplication accumulation (MAC) accelerators is restricted by parasitic interconnect resistances limiting the computation efficiency. In order to understand the impact of the interconnect (wire) resistance on the computation accuracy, this work proposes a modelling methodology for adapting the neural network weights regarding the weight error caused by wire resistance. Even more, this work investigates the maximal achievable crossbar size based on the proposed design variable “the minimal allowed weight error ratio Ron/Reqv” instead of using an iterative numerical method. Using the proposed method this work investigate the computation accuracy improvement through splitting the layer computation into multiple small crossbars. The result indicates that simply separating the computation into multiple small crossbar does not improve the accuracy always. Considering the minimal Ron/Reqv can more easily result in a proper crossbar size.
AB - The size of crossbar-like resistive multiplication accumulation (MAC) accelerators is restricted by parasitic interconnect resistances limiting the computation efficiency. In order to understand the impact of the interconnect (wire) resistance on the computation accuracy, this work proposes a modelling methodology for adapting the neural network weights regarding the weight error caused by wire resistance. Even more, this work investigates the maximal achievable crossbar size based on the proposed design variable “the minimal allowed weight error ratio Ron/Reqv” instead of using an iterative numerical method. Using the proposed method this work investigate the computation accuracy improvement through splitting the layer computation into multiple small crossbars. The result indicates that simply separating the computation into multiple small crossbar does not improve the accuracy always. Considering the minimal Ron/Reqv can more easily result in a proper crossbar size.
KW - Memristor
KW - Multiplication-Accumulation Accelerator
KW - Neuromorphic Computing Hardware
KW - Parasitic Wire Resistance
KW - Resistive Crossbar
UR - http://www.scopus.com/inward/record.url?scp=85108988652&partnerID=8YFLogxK
U2 - 10.1109/ISCAS51556.2021.9401279
DO - 10.1109/ISCAS51556.2021.9401279
M3 - Conference contribution
AN - SCOPUS:85108988652
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
BT - 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021
Y2 - 22 May 2021 through 28 May 2021
ER -