ANTIFUSE PROGRAMMING FPGAS PDF

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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FPGAs in computer

Antifuses may be used in programmable read-only memory PROM. 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.

Often a special bulb with no antifuse and often a slightly different rating so it blows first as the voltage gets too high known as a “fuse bulb” is incorporated into the string of lights to protect against the possibility of severe overcurrent if too many bulbs fail. 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.

Certain programmable logic devices PLDssuch as structured ASICsuse antifuse technology to configure logic circuits and create a customized design from a standard IC design. Articles needing additional references from May All articles needing additional references. QuickLogic Corporation refers to their antifuses as “ViaLinks” because blown fuses create a connection between two crossing layers of wiring on the chip in the same way that a via on a printed circuit board creates a connection between copper layers.

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Formation of the conductive channel is performed by a dielectric breakdown forced by a high voltage pulse. When a sufficiently high voltage is applied across the amorphous silicon it is turned into a polycrystalline silicon-metal alloy with a low resistancewhich is conductive.

Amorphous silicon is a material usually not used in either bipolar or CMOS processes and requires an additional manufacturing step. By fptas approach, it is possible only to lower the value of the resulting resistor.

Dielectric antifuses employ a very thin oxide barrier between a pair of conductors. This article needs additional citations for verification.

Antifuse – Wikipedia

The resulting resistance of the junction is in the range of 10 ohms. Occasionally, the insulation fails to break down on its own, but tapping the blown lamp will usually finish the job. An antifuse is an electrical device that performs the opposite function to a fuse. 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.

The terminals of the antifuses are usually accessible as bonding pads and the trimming process is performed before wire-bonding and encapsulating the chip. Whereas a fuse starts with a low resistance and is designed to permanently break an electrically conductive path typically when the current through the path exceeds a specified limit ptogramming, an antifuse starts with a high resistance and is designed to permanently create an electrically conductive path typically when the voltage across fgpas antifuse exceeds a certain level.

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From Wikipedia, the free encyclopedia. The antifuse is usually triggered using an approximately 5 mA current.

The spike is formed on and slightly below the silicon surface, just below the passivation layer without damaging it. 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.

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Each bit contains both a fuse and an antifuse and is programmed by triggering one of the two. The conductive shunt therefore does not compromise integrity and reliability of the semiconductor device. Their disadvantage, however, is lower area efficiency compared to other types. Antifuses are widely used to permanently program integrated circuits ICs. Unsourced material may be challenged and removed.

This rapidly causes the antifuse to short out the blown bulb, allowing the series circuit to resume functioning, albeit with a larger proportion of the mains voltage now applied to each of the remaining lamps. Zener diodes can be used as antifuses. 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.

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.

A standard NPN transistor structure is often used in common bipolar processes as the antifuse. The p-n junction that serves as such diode is overloaded with a current spike and overheated. By using this site, you agree to the Terms of Use and Privacy Policy.

Fptas this way, the failed lamp was bypassed and illumination restored to the rest of the street. Views Read Edit View history. 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.