| ASWITCH |
Analog Switch
The Analog Switch is a resistor that varies either logarithmically or linearly between specified values of a controlling input voltage or current. Note that if the input is not internally limited and if the controlling signal exceeds the specified OFF state or ON state value, the resistance may become excessively large or excessively small (in the case of logarithmic dependence), or may become negative (in the case of linear dependence). For the experienced user, these excursions may prove valuable for modeling certain devices, but in most cases you are advised to add limiting of the controlling input if the possibility of excessive control value variation exists.
| Description | Direction | Default Type | Allowed Types | Vector | Vector Bounds | Null Allowed |
| Input | IN | v | v,vd,i,id,vnam | NO | NO | |
| resistive output | INOUT | gd | gd | NO | NO |
| Name | Description | Data Type | Default Value | Limits | Vector | Vector Bounds | Null Allowed |
| cntl_off | Control off val | Real | 0.0 | NO | YES | ||
| cntl_on | Control on val | Real | 1.0 | NO | YES | ||
| log | Log/linear switch | Boolean | TRUE | NO | YES | ||
| r_off | Off resistance | Real | 1.0e12 | NO | YES | ||
| r_on | On resistance | Real | 1.0 | NO | YES | ||
| limit | Limit input value | Boolean | TRUE | NO | YES |
ASWITCH: CONTROL voltage delta less than 1.0e-12.
This message occurs as a result of the cntl_off and cntl_on values being less than 1.0e-12 volts/amperes apart.
a8 3 (6 7) switch3
.model switch3 aswitch(cntl_off=0.0 cntl_on=5.0 r_off=le6 r_on=10.0 log=TRUE)