Integrated circuit facilitating simultaneous programming of multiple antifuses
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United States of America Patent
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Feb 27, 1996
Grant Date -
N/A
app pub date -
Dec 1, 1994
filing date -
Dec 1, 1994
priority date (Note) -
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Abstract
To facilitate the simultaneous programming of multiple antifuses on an integrated circuit, a first current path is established from a first programming terminal (VPP1) of a programmable logic device through a first antifuse to be programmed and a second current path is established from a second programming terminal (VPP2) of the programmable logic device through a second antifuse to be programmed. By supplying the programming current for programming the first antifuse from a different terminal than the programming current for programming the second antifuse, the two antifuses can be programmed simultaneously with an adequate amount of programming current being supplied to each antifuse. A programming current multiplexer circuit is disclosed for selectively coupling either a first programming voltage (VPP1) terminal, a second programming voltage (VPP2), or a ground terminal (GND) to a programming bus and/or to an antifuse to be programmed. The first and second current paths can be established using multiple such programming current multiplexer circuits.
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