US Patent Application No: 2001/0010,036

Number of patents in Portfolio can not be more than 2000

Logic analysis system for logic emulation systems

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Abstract

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A portion of a logic emulation system is configured to sample logic values from the portion of the emulation system that is used to emulate the user digital logic design. These sampled values are then multiplexed by the emulation system to a logic analysis device. Typically, this is a commercially-available logic analyzer. To achieve this functionality, the emulation system is provided with a clock signal that has a higher frequency than the emulation clock signal received from the target or user system. This high speed clock signal is provided to logic analyzer as a strobe signal and controls the transfer of words of logic values from the emulation system to the logic analyzer. As a result, the number of signals that the logic analyzer can effectively sample for a cycle of the emulation clock is increased. Each probe of the logic analyzer can now receive multiple time-division multiplex logic values for each emulation clock cycle thus, increasing the width of logic analysis that can be performed on a particular emulation system with the conventional logic analyzers.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MENTOR GRAPHICS CORPORATIONWILSONVILLE, OR925

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Crouch, Kenneth Cambridge, MA 4 90
Selvidge, Charles W Wellesley, MA 23 459
Seneski, Mark Jamaica Plain, MA 10 92
Stewart, Kem Lexington, MA 3 61
Wong, Marina Wilmington, MA 3 61

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MENTOR GRAPHICS CORPORATION (3)
7,730,353 Memory-based trigger generation scheme in an emulation environment 3 2006
8,108,729 Memory-based trigger generation scheme in an emulation environment 2 2010
8,843,861 Third party component debugging for integrated circuit design 0 2013
 
CADENCE DESIGN SYSTEMS, INC. (1)
7,739,093 Method of visualization in processor based emulation system 1 2005
 
SYNOPSYS TAIWAN CO., LTD. (1)
7,120,571 Resource board for emulation system 5 2003
 
Other [Check patent profile for assignment information] (1)
8,868,974 Memory-based trigger generation scheme in an emulation environment 0 2012