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A memristor (/ ˈ m ɛ m r ɪ s t ər /; a portmanteau of memory resistor) is a non-linear two-terminal electrical component relating electric charge and magnetic flux linkage.It was described and named in 1971 by Leon Chua, completing a theoretical quartet of fundamental electrical components which also comprises the resistor, capacitor and inductor.
Stan Williams of HP Labs also argued that ReRAM was a memristor. [21] However, others challenged this terminology and the applicability of memristor theory to any physically realizable device is open to question. [22] [23] [24] Whether redox-based resistively switching elements (ReRAM) are covered by the current memristor theory is disputed. [25]
While the memristor is defined in terms of a two-terminal circuit element, there was an implementation of a three-terminal device called a memistor developed by Bernard Widrow in 1960. Memistors formed basic components of a neural network architecture called ADALINE developed by Widrow. [1] [2] The memistor was also used in MADALINE.
For a memristor, the electric field in the element is not as negligible as for the case of inductance, so the flux linkage is no longer equivalent to magnetic flux. In addition, for a memristor, the energy related to the flux linkage is dissipated in the form of Joule heating, instead of being stored in magnetic field, as done in the case of an ...
Scientists have discovered a new component of circuitry called a "meminductor." Even after 200 years, circuits are still blowing our minds.
Stan Williams of HP Labs has also argued that PCM should be considered a memristor. [5] However, this terminology has been challenged, and the potential applicability of memristor theory to any physically realizable device is open to question. [6] [7]
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1995 — Motorola (later to become Freescale Semiconductor, and subsequently NXP Semiconductors) initiates work on MRAM development 1996 — Spin torque transfer is proposed [ 27 ] [ 28 ] 1997 — Sony published the first Japan Patent Application for S.P.I.N.O.R. (Spin Polarized Injection Non-Volatile Orthogonal Read/Write RAM), a forerunner of ...