Changing resistance of modulation system with changing resistance of memristor to output computation result

Patent metadata

Field	Value
Publication number	US-12499940-B2
Application number	US-202217733233-A
Country	US
Kind code	B2
Filing date	Apr 29, 2022
Priority date	Nov 1, 2019
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A unit includes a first transistor, a memristor, and a resistance modulation unit, where a first port of the resistance modulation unit and a first port of the memristor are coupled to a first electrode of the first transistor, and the first electrode of the first transistor is configured to control the first transistor to be coupled and decoupled. The resistance modulation unit is configured to adjust, based on a resistance of the memristor, a voltage applied to the first electrode of the first transistor. The resistance of the memristor indicates the first data stored by the memristor, and when a voltage indicating second data is input to a second electrode of the first transistor which is configured to output a computation result of the first data and the second data from a third electrode of the first transistor.

First claim

What is claimed is:

1 . An apparatus, comprising:
a first transistor comprising:
a first electrode configured to control the first transistor to be coupled or decoupled;
a second electrode coupled to a read line and configured to obtain a first voltage indicating second data; and
a third electrode coupled to a computing line and configured to output a current to the computing line indicating a computation result of first data and the second data when a read voltage is applied to the read line, wherein a ratio of a highest current output by the third electrode to the computing line to a lowest current of output by the third electrode to the computing line is greater than 2,000;
a memristor comprising a first port and a second port, wherein the first port is coupled to the first electrode and is configured to store the first data, wherein the memristor has a first resistance indicating the first data, and wherein the memristor has a first lowest-resistance state and a first highest-resistance state; a resistance modulation system comprising a third port and a fourth port, wherein the third port is coupled to the first electrode, wherein the memristor and the resistance modulation system comprise a series connection from the second port of the memristor to the fourth port of the resistance modulation system, wherein the resistance modulation system has a second lowest-resistance state and a second highest-resistance state, and wherein the resistance modulation system is configured to:
configure, in response to the memristor being in the first highest-resistance state, the resistance modulation system to be in the second lowest-resistance state to control a gate voltage applied to the first electrode to be at a highest electrical level and the current of the first transistor to be at the highest current; and
configure, in response to the memristor being the first lowest-resistance state, the resistance modulation system to be in the second highest-resistance state to control the gate voltage applied to the first electrode to be at a lowest electrical level and the current of the first transistor to be at the lowest current; and
additional first transistors coupled to the read line and the computing line, wherein the first transistor and the additional first transistors are configured to be turned on at the same time, and wherein the apparatus is configured to accumulate output currents from the first transistor and the additional first transistors to perform a read operation.

2 . The apparatus of claim 1 , wherein the resistance modulation system comprises a second transistor, wherein the second transistor comprises:
a fourth electrode configured to control the second transistor to be coupled or decoupled; a fifth electrode; and a sixth electrode, and wherein the third port comprises the fifth electrode or the sixth electrode.

3 . The apparatus of claim 1 , wherein the resistance modulation system comprises a selector.

4 . The apparatus of claim 1 , wherein the memristor comprises a phase change memory, a ferroelectric memory, a magnetoresistive random-access memory (RAM), or a resistive RAM.

5 . The apparatus of claim 1 , wherein the resistance modulation system comprises a varistor.

6 . An apparatus, comprising:
a storage and computing array comprising a plurality of first storage and computing systems, wherein each of the first storage and computing systems comprises:
a first transistor comprising:
a first electrode configured to control the first transistor to be coupled or decoupled;
a second electrode coupled to a read line and configured to obtain a first voltage indicating second data; and
a third electrode coupled to a computing line and configured to output a current to the computing line indicating a computation result of first data and the second data when a read voltage is applied to the read line, wherein a ratio of a highest current output by the third electrode to the computing line to a lowest current of output by the third electrode to the computing line is greater than 2,000;

a first memristor comprising a first port and a second port, wherein the first port of the first memristor is coupled to the first electrode, wherein the first memristor is configured to store the first data, wherein the first memristor has a first resistance indicating the first data, and wherein the first memristor has a first lowest-resistance state and a first highest-resistance state;
a first resistance modulation system comprising a third port and a fourth port, wherein the third port is coupled to the first electrode, wherein the first memristor and the first resistance modulation system comprise a series connection from the second port of the first memristor to the fourth port of the first resistance modulation system, wherein the first resistance modulation system has a second lowest-resistance state and a second highest-resistance state, and wherein the first resistance modulation system is configured to:
configure, in response to the first memristor being in the first highest-resistance state, the first resistance modulation system to be in the second lowest-resistance state to control a gate voltage applied to the first electrode to be at a highest electrical level and the current of the first transistor to be at the highest current; and
configure, in response to the first memristor being the first lowest-resistance state, the first resistance modulation system to be in the second highest-resistance state to control the gate voltage applied to the first electrode to be at a lowest electrical level and the current of the first transistor to be at the lowest current; and

additional first transistors coupled to the read line and the computing line, wherein the first transistor and the additional first transistors are configured to be turned on at the same time, and wherein the apparatus is configured to accumulate output currents from the first transistor and the additional first transistors to perform a read operation.

7 . The apparatus of claim 6 , wherein the first resistance modulation system comprises a selector.

8 . The apparatus of claim 7 , wherein the storage and computing array comprises the first storage and computing systems in M rows×N columns, wherein M and N are integers greater than 1, wherein fifth ports of second resistance modulation systems in a plurality of second storage and computing systems located in a same row are coupled to a bit line, wherein fourth electrodes of second transistors in the second storage and computing systems are coupled to an input data line, wherein the input data line is configured to input to-be-computed data, wherein fifth electrodes of third transistors in a plurality of third storage and computing systems located in a same column are coupled to an output data line, wherein the output data line is configured to output a computation result, wherein sixth ports of second memristors in the third storage and computing systems are coupled to a selection line, and wherein the bit line and the selection line are configured to select fourth storage and computing systems that are to perform computation.

9 . The apparatus of claim 6 , wherein the first resistance modulation system further comprises a second transistor, and wherein the second transistor comprises:
a fourth electrode configured to control the second transistor to be coupled or decoupled; a fifth electrode; and a sixth electrode, wherein the third port comprises the fifth electrode or the sixth electrode.

10 . The apparatus of claim 9 , wherein the storage and computing array comprises the first storage and computing systems in M rows×N columns, wherein M and N are integ

Assignees

• Huawei Tech Co Ltd

Inventors

• Liao Jianxing
• Wu Wei
• Ni Leibin
• Wang Kanwen
• Zhang Rui

Classifications

• G11C13/003 Primary

  Cell access · CPC title

• G11C11/2297

  Power supply circuits · CPC title

• G06N3/065

  Analogue means · CPC title

• G11C13/0007

  comprising metal oxide memory material, e.g. perovskites · CPC title

• G11C13/004

  Reading or sensing circuits or methods · CPC title