公开(公告)号：US20240053288A1

公开(公告)日：2024-02-15

申请号：US17754484

申请日：2020-10-02

Applicant: Oxford Brookes University

Inventor： Abusaleh Jabir ,  Saurabh Khandelwal ,  Xiaohan Yang

IPC: G01N27/04 ,  G01N27/06

CPC classification number: G01N27/045 ,  G01N27/06

Abstract: A sensor comprises a group of four memristors arranged in an array. Two of the memristors are connected in series as a first pair, and the other two memristors are connected in series as a second pair. The first and second pairs are connected in parallel between two connection points. Each memristor acts as a sensor element because it has an electrical resistance characteristic that is related to exposure to a species to be sensed. In the sensor, the resistance characteristic of the array between the first and second connection points is related to exposure to the species to be sensed. A sensor comprising a larger array can be composed of multiple groups of four memristors.

公开(公告)号：US20220329254A1

公开(公告)日：2022-10-13

申请号：US17594416

申请日：2020-04-15

Applicant: Oxford Brookes University

Inventor： Abusaleh Jabir ,  Saurabh Khandelwal ,  Xiaohan Yang

IPC: H03M1/36 ,  H03M1/60

Abstract: A memristor-based circuit includes a voltage generator that applies a series of voltage pulses to a memristor to progressively change the resistance of the memristor. A comparator: receives an input electrical value; receives an electrical value based on the resistance of the memristor; compares the received values; and, based on the comparison, enables the application of the voltage pulses to the memristor by the voltage generator until a defined condition is satisfied. This circuit can be used to enable the memristor to be programmed to a desired resistance value, such as for use as a non-volatile memory. It can also enable the resistance of one memristor to be replicated to another memristor. By counting the number of applied voltage pulses, the circuit can be used as an encoder or analog-to-digital converter. Other variants of the circuit enable construction of a decoder or digital-to-analog converter, and an authentication circuit.

公开(公告)号：US10996182B2

公开(公告)日：2021-05-04

申请号：US16339493

申请日：2017-10-04

Applicant: Oxford Brookes University ,  University of Rome Tor Vergata

Inventor： Abusaleh Jabir ,  Marco Ottavi ,  Jimson Mathew ,  Eugenio Martinelli ,  Corrado Di Natale ,  Adedotun Adeyemo

IPC: G01R27/08 ,  G01N27/12 ,  G01N33/00 ,  G01N27/04 ,  G01N27/06 ,  G01N27/20 ,  G01N27/02 ,  H01L21/66

Abstract: A sensor comprises a plurality of sensor elements arranged in an array. Each sensor element is memristive and has an electrical resistance characteristic related to exposure to a species to be sensed. The sensor elements are arranged to be connectable such that at least one sensor element is connected in parallel with at least one other sensor element. By using appropriate connections, the array of sensor elements can be read.

公开(公告)号：US12007347B2

公开(公告)日：2024-06-11

申请号：US17754484

申请日：2020-10-02

Applicant: Oxford Brookes University

Inventor： Abusaleh Jabir ,  Saurabh Khandelwal ,  Xiaohan Yang

IPC: G01N27/06 ,  G01N27/04

CPC classification number: G01N27/045 ,  G01N27/06

Abstract: A sensor comprises a group of four memristors arranged in an array. Two of the memristors are connected in series as a first pair, and the other two memristors are connected in series as a second pair. The first and second pairs are connected in parallel between two connection points. Each memristor acts as a sensor element because it has an electrical resistance characteristic that is related to exposure to a species to be sensed. In the sensor, the resistance characteristic of the array between the first and second connection points is related to exposure to the species to be sensed. A sensor comprising a larger array can be composed of multiple groups of four memristors.

公开(公告)号：US11646749B2

公开(公告)日：2023-05-09

申请号：US17594416

申请日：2020-04-15

Applicant: Oxford Brookes University

Inventor： Abusaleh Jabir ,  Saurabh Khandelwal ,  Xiaohan Yang

IPC: H03M1/12 ,  H03M1/36 ,  H03M1/60

CPC classification number: H03M1/362 ,  H03M1/60

Abstract: A memristor-based circuit includes a voltage generator that applies a series of voltage pulses to a memristor to progressively change the resistance of the memristor. A comparator: receives an input electrical value; receives an electrical value based on the resistance of the memristor; compares the received values; and, based on the comparison, enables the application of the voltage pulses to the memristor by the voltage generator until a defined condition is satisfied. This circuit can be used to enable the memristor to be programmed to a desired resistance value, such as for use as a non-volatile memory. It can also enable the resistance of one memristor to be replicated to another memristor. By counting the number of applied voltage pulses, the circuit can be used as an encoder or analog-to-digital converter. Other variants of the circuit enable construction of a decoder or digital-to-analog converter, and an authentication circuit.

公开(公告)号：US20190227017A1

公开(公告)日：2019-07-25

申请号：US16339493

申请日：2017-10-04

Applicant: Oxford Brookes University ,  University of Rome Tor Vergata

Inventor： Abusaleh Jabir ,  Marco Ottavi ,  Jimson Mathew ,  Eugenio Martinelli ,  Corrado Di Natale ,  Adedotun Adeyemo

IPC: G01N27/12 ,  G01N33/00

Abstract: A sensor comprises a plurality of sensor elements arranged in an array. Each sensor element is memristive and has an electrical resistance characteristic related to exposure to a species to be sensed. The sensor elements are arranged to be connectable such that at least one sensor element is connected in parallel with at least one other sensor element. By using appropriate connections, the array of sensor elements can be read.