Ferroelectric capacitor

Ferroelectric capacitor

Ferroelectric capacitor is a capacitor based on a ferroelectric material. In contrast, traditional capactors are based on dielectric materials. Ferroelectric devices are used in digital electronics as part of ferroelectric RAM, or in analog electronics as tunable capacitors.

In memory applications, the stored value of a ferroelectric capacitor is read by applying an electric field. The amount of charge needed to flip the memory cell to the opposite state is measured and the previous state of the cell is revealed. This means that the read operation destroys the memory cell state, and has to be followed by a corresponding write operation, in order to write the bit back. This makes it similar to the ferrite core memory. The requirement for a write cycle for each read cycle, together with the high but not infinite write cycle limit, poses a potential problem for some special applications.

ee also

*Ferroelectricity
*Ferroelectric RAM

External links

* [http://www.eecg.toronto.edu/~ali/ferro/tutorial.html FeRAM Tutorial]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Ferroelectric RAM — (FeRAM or FRAM [FeRAM is the accepted generic acronym for ferroelectric random access memory.] ) is a random access memory similar in construction to DRAM but uses a ferroelectric layer instead of a dielectric layer to achieve non volatility.… …   Wikipedia

  • capacitor dielectric and piezoelectric ceramics — ▪ ceramics Introduction       advanced industrial materials that, by virtue of their poor electrical conductivity, are useful in the production of electrical storage or generating devices.       Capacitors (capacitor) are devices that store… …   Universalium

  • Capacitor (component) — Practical capacitors are often classified according to the material used as the dielectric, with the dielectrics divided into two broad categories: bulk insulators and metal oxide films (so called electrolytic capacitors ). Capacitor… …   Wikipedia

  • Ferroelectricity — is a property of certain materials which possess a spontaneous electric polarization that can be reversed by the application of an external electric field.[1][2] The term is used in analogy to ferromagnetism, in which a material exhibits a… …   Wikipedia

  • Non-volatile memory — Computer memory types Volatile RAM DRAM (e.g., DDR SDRAM) SRAM In development T RAM Z RAM TTRAM Historical Delay line memory Selectron tube Williams tube Non volatile …   Wikipedia

  • Electret — (formed of elektr from electricity and et from magnet ) is a dielectric material that has a quasi permanent electric charge or dipole polarisation. An electret generates internal and external electric fields, and is the electrostatic equivalent… …   Wikipedia

  • Capacitance — Electromagnetism Electricity · …   Wikipedia

  • Dielectric — A dielectric is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material, as in a conductor, but only slightly shift from their …   Wikipedia

  • Dielektrische Absorption — Prinzipdarstellung eines Kondensators mit Dielektrikum Ein Kondensator („Verdichter“, von lat.: condensus: „dichtgedrängt“, bezogen auf die elektrischen Ladungen) ist ein passives elektrisches Bauelement mit der Fähigkeit, elektrische Ladung und… …   Deutsch Wikipedia

  • Equivalent Series Resistance — Prinzipdarstellung eines Kondensators mit Dielektrikum Ein Kondensator („Verdichter“, von lat.: condensus: „dichtgedrängt“, bezogen auf die elektrischen Ladungen) ist ein passives elektrisches Bauelement mit der Fähigkeit, elektrische Ladung und… …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”