Title:
EXECUTION LOOKUP TABLE FOR HIGH-SPEED CARRY FOR COUNTER AND ADDRESS
Document Type and Number:
Japanese Patent JP3510903
Kind Code:
B2
Abstract:
PURPOSE: To provide a high-speed adder (provided with a subtractor) and a counter constituted of a programmable lookup table in a programmable logic device.
CONSTITUTION: A conventional lookup table 10 is divided into smaller lookup tables 10a and 10b in the case that the adder or the counter is requested. The divided lookup table 10a outputs total output signals to an output lead wire O/P and the other table 10b outputs high-speed carry out signals to the next stage of the adder or the counter onto lead wires X and Y.
Inventors:
Cliff, Richard G.
Cope, Todd L.
Kelly, Beanstler
Pedersen, Bruce B.
Cope, Todd L.
Kelly, Beanstler
Pedersen, Bruce B.
Application Number:
JP10703293A
Publication Date:
March 29, 2004
Filing Date:
May 07, 1993
Export Citation:
Assignee:
ALTERA CORP
International Classes:
G06F7/00; G06F1/035; G06F7/50; G06F7/501; G06F7/575; H03K19/177; H03K21/00; H03K23/00; (IPC1-7): G06F7/50; G06F7/00
Attorney, Agent or Firm:
浜田 治雄
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