FPGA (Field Programmable Gate Array) is an integrated circuit FPGA devices are produced by a number of semiconductor basic modes of programming: Antifuse-based FPGAs are different from the previous ones in that they can be. That is where the Field Programmable Gate Arrays (FPGAs) become of interest! They are hardware The antifuse programming technology is the simplest one. ❖The Programming technology. ❖The basic logic cells. ❖The I/O logic cells. ❖ Programmable interconnect. ❖Software to design and program the FPGA.
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The spike is formed on and slightly below the silicon surface, just below the passivation layer without damaging it. When the bulb blows, the entire mains voltage is applied across the single blown lamp. Views Read Edit View history. The p-n junction that serves as such fpgass is overloaded with a current spike and overheated.
Antifuse – Wikipedia
When the failed lamp was finally changed, a new piece of film was also installed, once again separating the electrical contacts in the cutout. The conductive shunt fpgaas does not compromise integrity and reliability of the zntifuse device. Antifuses are widely used to permanently program integrated circuits ICs. Formation of the conductive channel is performed by a dielectric breakdown forced by a high prlgramming pulse.
With a poly-diffusion antifuse, the high current density creates heatwhich melts a thin insulating layer between polysilicon and diffusion electrodes, creating a permanent resistive silicon link.
As the number of bonding pads is limited for a given size of the chip, various multiplexing strategies are used for larger number of antifuses.
In this way, the failed lamp was bypassed and illumination restored to the rest of the street.
Articles needing additional references from May All articles needing additional references. Because the series string would be rendered inoperable by a single lamp failing, each bulb has an antifuse installed within it.
FPGAs in computer
The larger, traditional, C7 and C9 style lights are wired in parallel and are rated to operate directly at mains voltage. This programming, performed after manufacturing, is permanent and irreversible. A specialized structure optimized for the purpose can be employed where the antifuse is an integral part of the design. Please help improve this article by adding citations to reliable sources.
It is therefore necessary to shift the manufacturing tolerances so that the lowest-value typically made is equal to or larger than the desired value. Each individual street-lamp was equipped with a film cutout ; a small disk of insulating film that separated two contacts connected to the two wires leading to the lamp.
Their disadvantage, however, is lower area efficiency compared to other types. They may be less susceptible to alpha particles which can cause circuits to malfunction.
This technology has many applications. Dielectric antifuses employ a very thin oxide barrier between a pair of conductors.
The insulation of the antifuse wire withstands the ordinary low voltage imposed across a functioning lamp but rapidly breaks down under the full mains voltage, giving the antifuse action. Antifuses are best known for their use in mini-light or miniature style low-voltage Christmas tree lights. Antifuses may be used in programmable read-only memory PROM.
The terminals of the antifuses are usually accessible as bonding pads and the trimming process is performed before wire-bonding and encapsulating the chip.
This page was last edited on 7 Julyat Amorphous silicon is a material usually not used in either bipolar or CMOS processes and requires an additional manufacturing step. May Learn how and when to remove this template message.
The antifuse is made using wire with a high resistance coating and this wire is coiled over the two vertical filament support wires inside the bulb. Retrieved from ” https: The antifuse is usually triggered using an approximately 5 mA current. Ordinarily for operation from mains voltagesthe antifue are wired in series.
An antifuse is an electrical device that performs the opposite function to a fuse. Unlike Christmas lights, the circuit usually contained an automatic device to regulate the electric current flowing in the circuit, preventing the current from rising as additional lamps burned out. Unsourced material may be challenged and removed.
Whereas a fuse starts with a low resistance and is designed to permanently break an antifues conductive path typically when the current through the path exceeds a specified limitatifuse antifuse starts with a high resistance and is designed to permanently create an electrically conductive path typically when the voltage across the antifuse exceeds a certain level.
In a similar fashion to that of Christmas tree lights, before the advent of high-intensity discharge lampsstreet light circuits using incandescent light bulbs were often operated as high-voltage series circuits. The parallel resistors cannot have too low value as that would sink the zapping current; a series-parallel combination of resistors and antifuses is employed in such cases.
They are historically used especially with bipolar processes, where the thin oxide needed for dielectric antifuses is not available. One approach for the ICs that use antifuse technology employs a thin barrier of non-conducting amorphous silicon between two metal conductors.
Also circuits built via the antifuse’s permanent conductive anticuse may be faster than similar circuits implemented in PLDs using SRAM technology.