The MOS device length, width, source area and drain area will default to common values if not specified for a device. These values are set by the following variables:
| Variable | Purpose | Default |
|---|---|---|
| defad | drain area | 0 M2 |
| defas | source area | 0 M2 |
| defl | gate length | 1 uM |
| defw | gate width | 1 uM |