Programmed programmable device and method for programming antifuses of a programmable device
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United States of America Patent
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Aug 6, 1996
Issued Date -
N/A
app pub date -
Aug 27, 1992
filing date -
Jul 31, 1991
priority date (Note) -
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Abstract
A programmable device comprises a first antifuse programmed with a first programming method and a second antifuse programmed with a second programming method, whereby an actual operating current flowing through the second antifuse exceeds a maximum permissible operating current of the first antifuse but does not exceed a maximum permissible operating current of the second antifuse, whereby an actual operating current flowing through the first antifuse does not exceed the maximum permissible operating current of the first antifuse, and whereby an actual operating current flowing through the second antifuse does not exceed the maximum permissible operating current of the second antifuse. By allowing the use of a programming method on some antifuses which would not be adequate for the programming of other antifuses, the realization of user-specific circuits in field programmable devices is facilitated and the reliability of user-specific circuits realized in field programmable devices is enhanced.
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