** Next:** .tf Line
** Up:** Analysis Specification
** Previous:** .pz Line
** Contents**
** Index**

##

`.sens` Line

- General Form:

`.sens `*outvar* [ac dec|oct|lin *np fstart fstop*]
[dc *dc_args*]

- Examples:

`.sens v(1,out)
`

.sens v(out) ac dec 10 100 100k

.sens i(vtest)

The sensitivity of *outvar* to all non-zero device parameters is
calculated when the sensitivity analysis is specified. The parameter
*outvar* is a circuit variable (node voltage or branch current).
Without the ac specification, the analysis calculates sensitivity of
the dc operating point value of *outvar*. If an ac sweep
specification is included, the analysis calculates sensitivity of the
ac values of *outvar*. The parameters listed for ac sensitivity
are the same as in an ac analysis. The output values are in
dimensions of change in output per unit change of input (as opposed to
percent in output or per percent of input).

The optional dc sweep is a dc analysis specification which will cause
the sensitivity analysis to be performed at each point of the dc
sweep. The small-signal parameters are reevaluated at every sweep
point, and the output vectors will be multidimensional.

In interactive mode, the **sens** command, which takes the same
arguments as the `.sens` line, can be used to initiate sensitivity
analysis.

Sensitivity analysis is not available if Josephson junctions are
included in the circuit.

** Next:** .tf Line
** Up:** Analysis Specification
** Previous:** .pz Line
** Contents**
** Index**
Stephen R. Whiteley
2017-10-02