Wednesday, December 2, 2009

More on memristors

From ElectroIQ: "HP's Stan Williams: Hybrid CMOS-memristors, the future of analog".
A memristor is the fourth fundamental circuit element (resistor, capacitor, and inductor being the three other well-known circuit elements) that can be described using two equations: a quasi-static equation, and a dynamical equation. The memristor's properties, Williams explained, depend on time; the state variable depends on the device's past history. The consequences of these properties and characteristics are that the device's C-V characteristic curve is a pinched hysteresis loop; the voltage and current always have to be 0 at the same time, so the device cannot store charge or energy, but it can store information. "This is key and profound in terms of being able to build new types of electronic circuits," observed Williams.

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