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OwnerHung-Cheng Hsieh, William S. Carter +2inventors
InventorsHung-Cheng Hsieh, William S. Carter, Charles S. Erickson, Edmond Y. Cheung
Estimating the term…
Programmable logic devices which include multiple blocks of combinatorial function generators and storage elements, and which are interconnected by a programmable interconnect structure are used, among other things for performing arithmetic functions which use logic for generating the carry function. When a large number of bits is to be processed, the carry function typically causes significant delay or requires significant additional components to achieve a result at high speed. The present invention provides dedicated hardware within the logic blocks for performing the carry function quickly and with a minimum number of components. The invention takes advantage of the fact that a carry signal to be added to two bits can be propagated to the next more significant bit when the two binary bits to be added are unequal, and that one of the bits can serve as the carry signal when the bits are equal.
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
An ordered array of logic blocks each comprising at least one array of logic blocks, each logic block having at least one circuit comprising:
An integrated circuit structure comprising:
An integrated circuit structure comprising:
An array of configurable logic blocks, each logic block comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
A programmable logic device comprising an array of logic blocks, each logic block having at least one circuit comprising:
Dependencies are inferred from the claim text.