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Soft Error Combinational Logic

These neutrons are moderated as they are scattered from the equipment and walls in the treatment room resulting in a thermal neutron flux that is about 40×106 higher than the normal One experiment measured the soft error rate at the sea level to be 5,950failures in time (FIT) per DRAM chip. Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view The Community for Technology Leaders Toggle navigation Libraries & Institutions About Resources RSS Feeds Newsletter Terms of Use Register now for a free account in order to: Sign in to various IEEE sites with a single account Manage your membership Get member discounts Personalize your experience Manage your profile weblink

Kobayashi, K. Hard figures for DRAM susceptibility are hard to come by, and vary considerably across designs, fabrication processes, and manufacturers. 1980s technology 256 kilobit DRAMS could have clusters of five or six Use of this web site signifies your agreement to the terms and conditions. Soft errors are caused by the high level of 10B in this critical lower layer of some older integrated circuit processes.

If erroneous data does not affect the output of a program, it is considered to be an example of microarchitectural masking. If the disturbance is large enough, a digital signal can change from a 0 to a 1 or vice versa. Please help improve this article by adding citations to reliable sources.

So, even a multi-cell upset leads to only a number of separate single-bit upsets in multiple correction words, rather than a multi-bit upset in a single correction word. That is, the average number of cosmic-ray soft errors decreases during the active portion of the sunspot cycle and increases during the quiet portion. The system returned: (22) Invalid argument The remote host or network may be down. US & Canada: +1 800 678 4333 Worldwide: +1 732 981 0060 Contact & Support About IEEE Xplore Contact Us Help Terms of Use Nondiscrimination Policy Sitemap Privacy & Opting Out

See also[edit] Electronics portal Single event upset Radiation hardening References[edit] ^ Artem Dinaburg (July 2011). "Bitsquatting - DNS Hijacking without Exploitation" (PDF). ^ Gold (1995): "This letter is to inform you Generated Fri, 28 Oct 2016 09:07:37 GMT by s_fl369 (squid/3.5.20) ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: http://0.0.0.8/ Connection One technique that can be used to reduce the soft error rate in digital circuits is called radiation hardening. ISSN0163-5964.

This technique is often used for write-through cache memories. The system returned: (22) Invalid argument The remote host or network may be down. F.; Lanford, W. IBM Journal of Research and Development.

Your cache administrator is webmaster. Cosmic ray flux depends on altitude. For instance, the erroneous data could be overwritten before use, masked in subsequent logic operations, or simply never be used. The capture cross section for 11B is 6 orders of magnitude smaller and does not contribute to soft errors.[6] Boron has been used in BPSG, the insulator in the interconnection layers

This high thermal neutron flux will generally result in a very high rate of soft errors and consequent circuit upset.[7] [8] Other causes[edit] Soft errors can also be caused by random have a peek at these guys Either of the charged particles (alpha or 7Li) may cause a soft error if produced in very close proximity, approximately 5µm, to a critical circuit node. Please try the request again. Subscribe Enter Search Term First Name / Given Name Family Name / Last Name / Surname Publication Title Volume Issue Start Page Search Basic Search Author Search Publication Search Advanced Search

It is typically expressed as either the number of failures-in-time (FIT) or mean time between failures (MTBF). Institutional Sign In By Topic Aerospace Bioengineering Communication, Networking & Broadcasting Components, Circuits, Devices & Systems Computing & Processing Engineered Materials, Dielectrics & Plasmas Engineering Profession Fields, Waves & Electromagnetics General Further, the increase in the solar flux during an active sun period does have the effect of reshaping the Earth's magnetic field providing some additional shielding against higher energy cosmic rays, check over here Use of this web site signifies your agreement to the terms and conditions.

In the spacecraft industry this kind of error is called a single event upset. doi:10.1109/RELPHY.1995.513695. ^ Wilkinson, J.D.; Bounds, C.; Brown, T.; Gerbi, B.J.; Peltier, J. (2005). "Cancer-radiotherapy equipment as a cause of soft errors in electronic equipment". While many electronic systems have an MTBF that exceeds the expected lifetime of the circuit, the SER may still be unacceptable to the manufacturer or customer.

However, from a microarchitectural-level standpoint, the affected result may not change the output of the currently-executing program.

At low energies many neutron capture reactions become much more probable and result in fission of certain materials creating charged secondaries as fission byproducts. IEEE. For applications in medical electronic devices this soft error mechanism may be extremely important. Your cache administrator is webmaster.

Conventional memory layout usually places one bit of many different correction words adjacent on a chip. Reduction in chip feature size and supply voltage, desirable for many reasons, decreases Qcrit. The system returned: (22) Invalid argument The remote host or network may be down. http://phabletkeyboards.com/soft-error/soft-error-ecc.php Register now for a free account in order to: Sign in to various IEEE sites with a single account Manage your membership Get member discounts Personalize your experience Manage your profile

doi:10.1145/545214.545226. This combination of capacitance and voltage is described by the critical charge parameter, Qcrit, the minimum electron charge disturbance needed to change the logic level. IBM. 40 (1): 19–40. Soft errors involve changes to data—​​the electrons in a storage circuit, for example—​​but not changes to the physical circuit itself, the atoms.

Thus, the importance of soft errors increases as chip technology advances. Your cache administrator is webmaster. After observing a soft error, there is no implication that the system is any less reliable than before. Thus, designers are usually much more aware of the problem in storage circuits.

Subscribe Enter Search Term First Name / Given Name Family Name / Last Name / Surname Publication Title Volume Issue Start Page Search Basic Search Author Search Publication Search Advanced Search If all three masking effects fail to occur, the propagated pulse becomes latched and the output of the logic circuit will be an erroneous value. Neutrons are uncharged and cannot disturb a circuit on their own, but undergo neutron capture by the nucleus of an atom in a chip. This is, of course, as good a way of describing a logic upset as any I've heard ...

Institutional Sign In By Topic Aerospace Bioengineering Communication, Networking & Broadcasting Components, Circuits, Devices & Systems Computing & Processing Engineered Materials, Dielectrics & Plasmas Engineering Profession Fields, Waves & Electromagnetics General Since a logic circuit contains many nodes that may be struck, and each node may be of unique capacitance and distance from output, Qcrit is typically characterized on a per-node basis. Integrated circuit manufacturers eliminated borated dielectrics by the time individual circuit components decreased in size to 150nm, largely due to this problem. This approach, however, often incurs performance overhead, area overhead (if copies of latches are used to store data), and power overhead, though is considerably more area-efficient than modular redundancy.

doi:10.1145/342001.339652. ACM SIGARCH Computer Architecture News. 28 (2): 25–36. Your cache administrator is webmaster. in your book, Caves of Steel, published in the 1950s, you use an alpha particle emitter to 'murder' one of the robots in the story, by destroying ('randomizing') its positronic brain.

In the context of circuit operation, this erroneous output value may be considered a soft error event. However, in many systems, it may be impossible to determine the correct data, or even to discover that an error is present at all. Soft errors can occur on transmission lines, in digital logic, analog circuits, magnetic storage, and elsewhere, but are most commonly known in semiconductor storage. Soft error rate[edit] Soft error rate (SER) is the rate at which a device or system encounters or is predicted to encounter soft errors.