Dynamic Node Capacitance Check (dyn_nodecap )

Spectre Syntax

title dyn_nodecap <node=[node1 node2...]> <time=[t1 t2...]> <inst=[inst1 inst2...]> <xinst=[xinst1 xinst2...]> <subckt=[subckt1 subckt2....]> <xsubckt=[xsubckt1 xsubckt2....]> <fanout=all|gate|bulk> <depth=n> error_limit=<value><intrinsic_cap_merge=no|yes>

SPICE Syntax

.cck title dyn_nodecap <node=[node1 node2...]> <time=[t1 t2...]> <inst=[inst1 inst2...]> <xinst=[xinst1 xinst2...]> <subckt=[subckt1 subckt2....]> <xsubckt=[xsubckt1 xsubckt2....]> <fanout=all|gate|bulk> <depth=n> error_limit=<value><intrinsic_cap_merge=no|yes>

Description

Reports the node capacitance at the specified time (time) of a transient simulation. Device capacitances, voltage dependent capacitances, grounded and coupling caps are combined into one value. The results are written to a file with the extension dynamic.xml, which can be viewed using a Web browser.

Arguments

node	Nodes for which the capacitance needs to be checked. Default value is none.
time	Time points at which the check needs to be performed.
inst	Subcircuit instances to which the circuit check is applied. Default is inst=*.
xinst	Subcircuit instances that are excluded from the circuit check. Default is none.
subckt	Instances of the specified subcircuit to which the circuit checks are applied. Default is subckt=*.
xsubckt	Instances of the specified subcircuit which are excluded from the circuit checks. Default is none.
intrinsic_cap_merge	Merges the internal captab node with the external node. Possible values are yes and no. The default value is no. This option is supported only in Spectre and Spectre APS.
fanout	Fanout setting to filter node with specified connection. Possible values are all, gate, and bulk. Default is all. This option is supported only in Spectre FastSPICE mode.
depth	Hierarchy level (from top level) to be checked. depth=3 reports the errors on top level with three sublevels. Default is 8.
error_limit	Maximum number of errors to be reported. Default is 10000.

Example

n1 dyn_nodecap node=[*] time=[0 3n 7n]

This example reports the node capacitance for all nodes at times 0, 3ns and 7ns.

The following is an example report displayed in the Web browser.

Related Topics

Dynamic Checks

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