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ANTIFUSE FPGA PDF

The antifuse technology, routing architecture, logic mod- ule, design automation, programming, testing and use of ACTTM antifuse FPGA ‘s are described. FPGA Architectures Overview. In this short article we discuss modern FPGA architectures (SRAM-based, flash-based, antifuse- based) and their applications. Imperial College, Digital System Design. Actel FPGAs. ◇ Uses antifuse technology. ◇ Based on channelled gate array architecture as shown below.

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In this way, the failed lamp was bypassed and illumination restored to the antifude of the street. 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.

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

This technology has many applications. 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.

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. This article needs additional citations for verification. 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. Ordinarily fpya operation from mains voltagesthe lamps are wired in series.

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Because the series string would be rendered inoperable by a single lamp failing, each bulb has an antifuse installed within it. Each bit contains both a fuse and an antifuse and is programmed wntifuse triggering one of the two.

Zener diodes can be used as antifuses. A specialized structure optimized for the purpose can be employed where anifuse antifuse is an integral part of the design. 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.

antjfuse An antifuse is an electrical device that performs the opposite function to a fuse. The conductive shunt therefore does not compromise integrity and reliability of the semiconductor device.

The resulting resistance of the junction is in the range of 10 ohms. Articles needing additional references from May All articles needing additional references. The spike is formed on and slightly below the silicon surface, just below the passivation layer without damaging it.

antifuse Definition from PC Magazine Encyclopedia

Zener zap is frequently employed in mixed-signal circuits for trimming values of analog components. 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. 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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The antifuse is usually triggered using an approximately 5 mA current. Unsourced material may be challenged and removed.

When a sufficiently high voltage is applied across ffpga amorphous silicon it is turned into a polycrystalline silicon-metal alloy with a low resistancewhich is conductive. In the same fashion as with the Christmas lights described above, if the lamp failed, the abtifuse voltage of the street lighting circuit thousands of volts was imposed across the insulating film in the cutout, causing it to rupture. This programming, performed after manufacturing, is permanent and fpta. Retrieved from ” https: QuickLogic Corporation refers to their antifuses as “ViaLinks” because blown fuses create zntifuse 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.

Amorphous silicon is a material usually not used in either bipolar or CMOS processes and requires an additional manufacturing step. Please help improve this article by adding citations to reliable sources.

In some cases a combined circuit with zeners and transistors can be used to form a zapping matrix; with additional zeners, the trimming which uses voltages higher than the normal operational voltage of the chip can be performed even after packaging the chip.