This document discusses memristors and their applications in memory chips. It describes memristors as passive two-terminal components that relate charge and magnetic flux. Memristors can be used in Resistive Random Access Memory (RRAM) cells. The document discusses titanium dioxide memristors, which were proposed by HP researchers. Memristors are promising for building high capacity, low power memory structures. They allow data to be written and read nearly 100 times faster than flash memory. Resistive RAM using memristors has write voltages and times lower than flash. Memristors can store data through the formation of conductive filaments, and retain data when unpowered. They can enable more efficient computing through applications like non-

1. Challenges of
Emerging Memory
Memristor.
V Priya
S Suganeshwaran
Remy Lumin Benedict
EEE, Kongu engineering college.

2. INTRO : MEMRISTOR
•passive two terminal electrical component.
•fundamental non-linear circuit element relating charge
and magnetic flux linkage.
•In the field of memory chips, memristors can be used
in Resistive Random Access Memory (RRAM) cell
structures.
•It was envisioned, and its name coined, in 1971 by
circuit theorist Leon Chua.

3. CURRENT-VOLTAGE (I-V) CHARACTERISTIC:
•I-V characteristic of the memristor cannot be
achieved using any combination of the other three
basic components.

4. FABRICATION-Titanium Dioxide Memristor
• proposed by members of an HP Lab.
• The titanium dioxide film consists of two layers,
one of which has a slight depletion of oxygen
atoms with oxygen vacancies which act as
charge carriers.
• The doped layer has a much lower resistance
than the undoped layer.

5. MEMRISTORS MEMORIES:
• very promising candidates to build storage structures because of
high capacity, short switching time and low power consumption.
• Considerable time and energy are consumed in the serial movement
of data between CPU, SRAM, and NVM and writing data to NVM
during power-off operation.
• nearly one hundred times faster than the contemporaneous Flash
memory.
• According to Allied Market Research, memristor market was worth
$3.2 million in 2015 and will be worth $79.0 million by 2022.

6. Resistive Random-Access Memory
• it holds its resistive value, even after it is unplugged from a
power source.
• resistive RAM incur write voltage and write time lower than
that of Flash memory, particularly attractive for energy-
efficiency systems.

7. How it works
• "memory resistor" -- whose resistance varies when
different voltages are imposed across it.
•a deliberately applied voltage causes the medium to acquire
microscopic conductive paths called filaments.
•Once a filament appears, it can be broken or reversed by the
application of a different external voltage.
•The controlled formation and destruction of filaments in large
numbers allows for storage of digital data.

8. • it can be used in designing a combined memory and logic
functions on the same chip.
•Memristor-based crossbar arrays can be used to compute logic
functions based on the placement of the switches on the wire
junction.
MEMRISTORS nvLOGIC

9. Concept and applications of nvLogics
logic circuits like
Flipflops SRAM TCAM
NVM (eFlash)
In a conventional system
critical data moved serially from
In NVLogics based system and energy required
by the system to power-down and wake-up can
be effectively reduced :
Data moved in parallel
manner
Emerging NVMs have
low operating power
Fast access time
Thus nvLogics can enable energy-efficient
systems under frequent power-off conditions

10. Emerging memory-based Security
Circuits
PUF-based network security scheme and brief authentication flow

11. • The illustrates the concept of physical unclonable function
(PUF)-based network security schemes and a brief
authentication flow.
• Conventional PUFs exploit random variations in the CMOS
process
• Emerging NVMs enhance the randomness of PUFs due to
intrinsic variations in their resistive switching processes.
CONCEPT

12. CONCLUSION
• The RRAM or memristor becomes front runner in all of them due to its lower
footprint, lower power dissipation, higher data retention capabilities and faster
speed of operation.
• Due to their low operating voltages, fast access speeds, and compatibility with
CMOS devices, emerging NVM devices have enabled many innovative circuits
for advanced system architectures and computing model.

13. THANK YOU
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