公开(公告)号：US20240296319A1

公开(公告)日：2024-09-05

申请号：US18544268

申请日：2023-12-18

Applicant: POSTECH Research and Business Development Foundation

Inventor： Chang Ki BAEK ,  Yi Joon KIM ,  Hyang Woo KIM

IPC: G06N3/063 ,  H01L29/165 ,  H01L29/68 ,  H01L29/78 ,  H03K17/567

CPC classification number: G06N3/063 ,  H03K17/567 ,  H01L29/165 ,  H01L29/685 ,  H01L29/78

Abstract: Disclosed are an integrate-and-fire neuron circuit implemented to enable an integrate-and-fire operation with only a small number of devices by using bistable resistance characteristics of the same two heterojunction NPN devices, unlike a CMOS-based integrate-and-fire neuron circuit having a complex structure, and an operation method thereof. In one or more aspects, an integrate-and-fire neuron circuit and an operation method thereof can increase neuron integration in a system by implementing an integrate-and-fire operation of neurons using only three transistors and two capacitors, or two transistors, one resistor and one capacitor, can improve the efficiency of spiking neural network learning by controlling a fire threshold point of neurons through regulation of a gate voltage of the same two NPN devices, and can expect an increase in energy efficiency of the entire system through inhibition of excessive fire by implementing excitatory and inhibitory post-synaptic potentials.

公开(公告)号：US20240030888A1

公开(公告)日：2024-01-25

申请号：US18254131

申请日：2021-11-17

Applicant: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Byoung Don KONG ,  Seok Hyun YOON ,  Hyeon Su CHO ,  Seung Ho LEE ,  Gyeong Min SEO ,  Chang Ki BAEK

IPC: H03H9/02 ,  H03H9/64 ,  H03H9/72

CPC classification number: H03H9/02574 ,  H03H9/64 ,  H03H9/72

Abstract: There is provided a substrate for a surface acoustic wave device, comprising a 2-dimensional (2D) crystalline hexagonal boron nitride layer, wherein a surface acoustic wave of the surface acoustic wave device is transmitted through the 2D crystalline hexagonal boron nitride layer.