Memristor the fourth basic elememt
- 2. MEMRISTOR A Memristor is a passive non-linear two terminal electrical component considered to be the Fourth circuit element in addition to the existing circuit elements inductor, capacitor and Resistor.
- 3. MEMRISTOR DETAILS IN SHORT Memristor Type Passive Working principle Memristance Invented Leon Chua (1971) Electronic symbol
- 4. WHY THIS NAME Like a resistor, It creates and maintains a safe flow of electrical current across a device and also it can remember last charge flow through it. Memory + Resistor=Memristor It is different from a normal resistor as it can remember the last charge flow through even when the supply is turned off.
- 5. APPEARANCE OF MEMRISTOR It was first appeared in the paper “Memristor The Missing Circuit Element” in 1971 published by Leon Chua. He is a proffessor in the university of California. The First Practical model was developed by R. Stanley Williams from HP.
- 6. WORKING PRINCIPLE OF MEMRISTOR Memristance is a property of an electronic component. If charge flows in one direction through a circuit, the resistance of that component of the circuit will increase, and if charge flows in the opposite direction in the circuit, the resistance will decrease. If the flow of charge is stopped by turning off the applied voltage, the component will 'remember' the last resistance that it had, and when the flow of charge starts again the resistance of the circuit will be what it was when it was last active
- 7. WORKING OF MEMRISTOR A physical memristor conistst of two platinum electrodes and its resistance based on polarity,magnitude and length. When a voltage is applied across the two terminals, as shown above – the oxygen atoms in the material disperse towards left or right. And then, the material will become thinner or thicker depending on the polarity of the voltage, thus causing a change in the resistance. When the voltage is turned Off, the resistance remains as it did just before it switched off. This makes a memristor non volatile memory device.
- 8. A PIPE AS A MEMRISTOR Imagine you are having a pipe which diameter changes with volume of flow of water. If the volume of water flow is high, the diamter of pipe also high. If the volume of walter flows is less,the diameter of pipe also less. If the Water flow Is stopped it remins in the same diameter when it experience the last flow of water.
- 9. TYPES OF MEMRISTORS Memristors are classified into two types. They are: 1.Ionic Thin Film And Molecular Memristors 2.Magnetic and spin based Memristors Ionic Thin Film And Molecular memristors: Molecular and ionic thin film resistors depend on thin film atomic lattices that display hysteresis below charge.
- 10. IONIC THIN FILM AND MOLECULAR MEMRISTOR TYPES Titanium Dioxide Memristors. Ionic or Polymeric Memristors. Di-electric type. Resononant tunneling diode memristors. Magnatite Memristors.
- 11. MAGNETIC AND SPIN BASED MEMRISTORS AND TYPES Spin based memristors are opposite to ionic and molecule based memristor and rely on the property of degree in electron spin.In this type, polrization of electron spin is aware. Types: 1.Spintronic Memristors. 2.Spin Torque transfer memristors.
- 12. APPLICATIONS OF MEMRISTORS The main application of memristor is memory. It has Other Advantages too. Here are the areas Where memristor can be Used: 1.Computers 2.Logic Circuits 3.Digital memory
- 13. ADVANTAGES OF MEMRISTOR It requires less voltage. It generates less heat. It will not consume power when idle. It is non-volatile. It has good scalability. It is Superior To Flash memory.
- 14. DISADVANTAGES OF MEMRISTOR It is not currently commercially available now. The speed and performance was suspected. Since all the data's in computer become non volatile the reboot will not solve any problem as DRAM does.
- 15. MEMRISTOR IN COMPUTERS It has the property which cannot be duplicated by other components (Inductor,Resistor,Capacitor). Capable of replacing DRAM and Hard Drives. Quicker boot Ups. It can use any number between 0 and 1. Less Voltage consumption. Work better as it gets smaller.
- 16. TRANSISTOR REPLACEMENTS The hungry power consumption of transistor is a barrier to miniaturization and microcontroller development. It act as a crossbar latch to transistor. In future the computer size become smaller by the use Memristor.
- 17. LOGIC GATE CIRCUITS It can be used in stand alone logic gate. Can be used to do digital logic implication instead of NAND.
- 18. WHY IT IS DELAYED? There were hundred of memristors built but many of them need to be perfected. Needs to eliminate defects. It has no standard rules of designing.
- 19. Questions?
- 20. Thank You.