Static Transmission Gate Check (static_tgate)

Spectre Syntax

title static_tgate node=[n1 n2 ...] <inst=[inst1 inst2...]> <xinst=[xinst1 xinst2...]> <subckt=[subckt1 subckt2....]> <xsubckt=[xsubckt1 xsubckt2....]> <depth=n> error_limit=<value>

SPICE Syntax

.cck title static_tgate node=[n1 n2 ...] <inst=[inst1 inst2...]> <xinst=[xinst1 xinst2...]> <subckt=[subckt1 subckt2....]> <xsubckt=[xsubckt1 xsubckt2....]> <depth=n> error_limit=<value>

Description

Reports transmission gates which may cause potential leakage currents between power supplies. Such gates can be characterized by their node connectivity, based on the following:

• Nodes which connect to gate and NMOS drain/source terminals, but not to PMOS drain/source terminals
• Nodes which connect to gate and PMOS drain/source terminals, but not to NMOS drain/source terminals

The results are written to a file with the extension static.xml, which can be viewed with a Web browser.

Arguments

node	Nodes to be checked. Default is none.
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.
depth	Hierarchy level (from top level) to be checked. depth=3 reports errors on top level plus 3 sublevels. Default is 8.
error_limit	Maximum number of errors to be reported. Default is 10000.

Example

Spectre Syntax

tgate1 static_tgate node=["*"]

SPICE Syntax

.cck tgate1 static_tgate node=["*"]

The above command will report all nodes connecting to transmission gates that may cause design problems like leakage currents. The following is an example of the report that is displayed in the Web browser:

Related Topics

Static Checks

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