Memristor ppt

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  • 1. BYVIDYA

2. MEMRISTORMemristorMemory + ResistorMemristor 3. A Memristor is a semiconductor whose resistancevaries as a function of flux and charge. This allowsit to remember what has passed through thecircuit. Characterized by Memristance 4. Memristance is simply charge-dependent resistance.V(t) = M(q(t))*I(t) Unit - ohm () Symbol 5. Theory was developed in 1971 by Professor LeonChua at University of California, Berkeley. Found while exploring symmetry between the threefundamental passive linear circuit elements. In 2006, R.Stanley Williams developed practicalmodel. 6. Voltage, V (V) work done required to bring chargefrom to a Electric field. Current, I (A) flow of electric charge Flux, (W) rate of flow through an area Charge, Q (C) energy per electron 7. Current is the derivative of ChargeI=dQ/dt Voltage is the derivative of Flux V= d/dt 8. Voltage Current(V) (i)ChargeFlux ()(q) 9. Capacitor,C (F) Resistor,R () Inductor,L (H) 10. q=Cv 11. Voltage Current(V) (i)Capacitors q=CvChargeFlux ()(q) 12. Ohms Lawv=Ri 13. Voltage Resistors Current(V) v=Ri(i)Capacitors q=Cv Charge Flux () (q) 14. =Li 15. Voltage ResistorsCurrent(V) v=Ri (i)v=d/dti=dq/dtCapacitors q=Cv = Li Inductors Charge ?Flux () (q)? 16. Voltage ResistorsCurrent(V) v=Ri (i)v=d/dti=dq/dtCapacitors q=Cv = Li InductorsCharge=Mq Flux ()(q) Memristors 17. =Mq d/dt = M(q) dq/dt V(t) = M(q) I P = I M(q) 18. Retain its resistance level even after power had beenshut down. Remember (or recall) the last resistance it had, beforebeing shut off. 19. 2 nm PTTiOv(2-x)PT(-)ve TiO2(+)ve 3 nm Reduced Oxidized Applied voltage makes the oxygen vacancies(+ve) to shift towards the ve voltage. 20. Shift between the layers is permanent in nature. It exist even after the voltage has been removed. Causes the permanent change in resistance. 21. The diameter of pipe remains same when the current is switched off, until it is switched on again. The pipe, when the current is switched on again, remembers what currentA RESISTOR WITH MEMORY has flowed through it.BEHAVES LIKE A PIPE 22. As its effect depends on atomic-scalemovements, it only poped up on the nanoscaleof Williams devices. 23. Would allow for a quicker boot up since informationis not lost when the device is turned off. Uses less energy and produces less heat. Eliminates the need to write computer programs thatreplicate small parts of the brain. 24. Provides greater resiliency and reliability when power isinterrupted in data centers. Density allows for more information to be stored. Power Consumption As non-volatile memory, memristors do not consumepower when idle. 25. Conventional devices use only 0 and 1; Memristorcan use anything between 0 and 1. Faster than Flash memory. Allow digital cameras to take pictures with no delay inbetween. Innovating nanotechnology due to the fact that itperforms better the smaller it becomes. 26. Pattern recognition and learning. Crossbar latches to replace transistors. New forms signal processing and control systems. Memristors can be used to do digital logic usingimplication instead of NAND. 27. Though hundreds of thousands of memristorsemiconductors have already been built, there is stillmuch more to be perfected. Needs more defect engineering. No design standards (rules).