US 12,131,249 B2
Arithmetic devices with look-up table for neural network
Choung Ki Song, Yongin-si Gyeonggi-do (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si Gyeonggi-do (KR)
Filed on Oct. 21, 2020, as Appl. No. 17/076,428.
Application 17/076,428 is a continuation in part of application No. 16/932,400, filed on Jul. 17, 2020, granted, now 12,014,184.
Application 16/932,400 is a continuation in part of application No. 16/919,786, filed on Jul. 2, 2020, granted, now 11,915,125.
Claims priority of provisional application 62/959,574, filed on Jan. 10, 2020.
Claims priority of provisional application 62/959,593, filed on Jan. 10, 2020.
Claims priority of provisional application 62/958,614, filed on Jan. 8, 2020.
Claims priority of provisional application 62/958,609, filed on Jan. 8, 2020.
Claims priority of application No. 10-2019-0138114 (KR), filed on Oct. 31, 2019; and application No. 10-2019-0160238 (KR), filed on Dec. 4, 2019.
Prior Publication US 2021/0132954 A1, May 6, 2021
Int. Cl. G06N 3/048 (2023.01); G06F 1/03 (2006.01); G06F 7/544 (2006.01)
CPC G06N 3/048 (2023.01) [G06F 1/03 (2013.01); G06F 7/5443 (2013.01); G06F 2207/4824 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An arithmetic device comprising:
a multiplying-accumulating (MAC) circuit configured to perform a MAC arithmetic operation for weight data and vector data to generate an arithmetic result signal; and
an activation function (AF) circuit configured to extract a first bit group and a second bit group from the arithmetic result signal, configured to generate an input distribution signal based on the first bit group and the second bit group, and configured to select and output an output distribution signal that corresponds to the input distribution signal based on an activation function,
wherein the activation function circuit includes a look-up table, and
wherein a size of the look-up table corresponds to a number of bits of the first bit group.