MEMRISTOR
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The memristor, introduced by Priyanka, is a fourth fundamental passive element whose resistance changes based on flux and current, allowing it to remember past electrical states. It operates using titanium dioxide (TiO2) and exhibits advantages such as non-volatility, high density, and compatibility with existing technologies, making it suitable for applications in artificial intelligence and neuromorphic circuits. The memristor is expected to revolutionize circuit design in the 21st century, similar to the impact of transistors in the 20th century.
MEMRISTOR
- 1. MEMRISTOR PRESENTED BY PRIYANKA ( 4th YEAR ECE) (THE FOURTH FUDAMENTAL PASSIVE ELEMENT)
- 2. Four Fundamental Passive Elements RESISTOR CAPACITOR INDUCTOR ?..
- 3. Symbol - Unit – ohms (Ω)
- 4. Defination of memristor A memristor is a semiconductor whose resistance varies as a function of flux and current. This allows it to “remember” what has passed through the circuit. Characterized by Memristance M(q)=dФm /dt
- 5. •Theory was developed in 1971 by Professor Leon Chau at university of California , Berkeley. •Found while exploring symmetry between the three fundamental passive linear circuit elements •In 2008, R.Stanley Williams developed the practical model Emergence of memristic theory Prof. LEON.O.CHAU
- 6. Symmetry Relationship VOLTAGE (V) CURRENT ( i ) CHARGE ( q ) FLUX (Ф ) Resistor Inductor Memristor Capacitor V=R i q=CV Ф = 𝑴𝒒 Ф= L i V=dФ/dt i=dq/dt
- 7. Working Pt Pt . . . . . . . . TiO2-x . . . . . .
- 8. Working cont... • Like silicon, titanium dioxide (TiO2) is a semiconductor , and in its pure state its highly resistive. • However it can be doped with other elements to make it very conductive. • In TiO2 , the dopants don’t stay stationary in a high electric field, they tend to drift in the direction of the current.
- 9. Cont… Putting a bias voltage across a thin film of TiO2 semiconductor that has dopant on the one side cause them to move into the pure TiO2 on the other side. And thus lowers the resistance Running current in the other direction will then push the dopants back into place, increasing the TiO2’s resistance.
- 10. ANALOGY OF MEMRISTOR A Resistor with memory behaves like a pipe •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 current has flowed through it.
- 12. Advantages Hard Disk + RAM =MEMRISTOR Eliminates delay Speed is inversely proportional to size Large density 1 terabit/cm Analog data storage possible Act as microprocessor Non volatile memory Uses less energy Compatible with current CMOS interfaces Faster than flash memory Conventional devices use only 0 and 1 ; memristor can use anything between 0 and 1. 2
- 13. Applications Artificial intelligence Cross bar latches as transistor replacements Analog computations Circuits which mimic Neuromorphic and biological systems(learning circuits) Programmable logic and signal processing
- 14. Summing it up….. Thememristorwillenhancecircuit designinthe21st centuryasradicallyas thetransistor changed itinthe20th . It is believe that it could replace DRAMs by 2014 and maybe Hard Disk by 2016.
- 16. THANK YOU