Requests that relative sensitivities be calculated for specified circuit elements with respect to the first requested output variable. The '.' before SENSR must be in the first column of the record. The elements for which the relative sensitivity will be calculated are listed on the SENSR record. Relative sensitivity can be calculated for any conductor (G type element), resistor (R type element), capacitor (C type element), inductor (L type element), or multiplier (MUL type element) in the circuit. The sensitivity reported for R elements will be that for the corresponding G element. The sensitivity to the R value is obtained by multiplying the reported sensitivity value by -1.0.
If sensitivities to the other elements listed under the SENSA record description are requested as relative sensitivities, absolute sensitivities will be calculated and reported.
Sensitivities are calculated as part of an AC or VARY analysis. An AC or VARY analysis (see AC ad VARY record descriptions) must be requested for a SENSR analysis to be performed. Sensitivities are calculated at the frequencies requested in the AC or VARY analysis request.
Relative sensitivities are defined as:
dO(jw)/dh * (h/O(jw))
where O(jw) is the first requested output variable for the analysis and h is the specified network element.
All sensitivities calculated are presented in real and imaginary form. The sensitivity format is independent of the format requested for the AC analysis.
Note that only a single .SENSA or a single .SENSR request can be made for any one analysis.
Example:
.SENSR c3, r32, g8, cl, rb