Dynamic Noisy Node Check (dyn_noisynode)
Description
Identifies the nodes with unstable or noisy node conditions. A node is considered unstable or noisy if its voltage fulfills the condition abs(dV/dt)>e1 and abs(d(dV/dt)dt)>e2 for a time longer than duration. Stable periods shorter than skip are ignored.
The results are written to the dynamic.xml file, which can be viewed in a Web browser.
Syntax
Name dyn_noisynode parameter=value ...
Parameters
Design check parameters
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node
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[...]
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Nodes to which the check is applied. Default is none.
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duration
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5.00E-07 sec
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Duration threshold. Default is 5.00E-07 sec.
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e1
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5.00E04 volt/sec
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The first derivative threshold. Default is 5.00E04.
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e2
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2.00E16 volt/(sec2)
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The second derivative threshold. Default is 2.00E16.
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skip
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50.0E-09 sec
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The stable period less than skip is ignored. Default is 50.0E-09.
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Filtering parameters
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time_window
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[tstart, tstop] sec
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The time window during which the circuit check is applied. Multiple non-overlapping time windows are supported. Default time window is 0 to tend.
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error_limit
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10000
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Maximum number of errors reported. Default is 10000.
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fanout
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all
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Fanout setting to filter node with specified connection. This option is supported only in XPS.Possible values are all, gate and bulk.
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Wildcard scoping
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inst
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[...]
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Subcircuit instances to which the check is applied. Default includes all instances (inst=*).
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xinst
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[...]
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Subcircuit instances to be excluded from the check. Default is none.
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subckt
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[...]
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The instances of the specified subcircuit to which the check is applied. Default includes all subcircuits (subckt=*).
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xsubckt
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[...]
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The instances of the specified subcircuits that are excluded from the check. Default is none.
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depth
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8
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Hierarchy levels (starting from top, instance, or subcircuit scope) to be checked. Default is 8.
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Related Topics
Dynamic Noisy Node Check
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