geoshrink

.option geoshrink=value

Description

The geoshrink option is an alias of the Spectre option scalefactor. It is used for Device Model Technology Scaling. The options parameter scalefactor enables device model providers to scale the device technology independent of the design dimension scaling done by circuit designers. The resulting device instance scaling is defined by 'scale * geoshrink'.

Unlike the options parameter scale, scalefactor cannot be used as a netlist parameter and cannot be altered or used in sweep statements.

Example

.option geoshrink=0.9

.option scale=1e-6

The size of the devices is shrunk by 0.9. The compounded scaling of the device instance dimension is 0.9e-6 since scale is specified as 1e-6.