** Next:** MESFET Models (both N
** Up:** Semiconductor Devices
** Previous:** JFET Models (both N
** Contents**
** Index**

##

MESFETs

- General Form:

`z`*name* *nd ng ns modname* [*parameters* ...]

**Parameter Name ** |
**Description** |

`off ` |
Device is initially nonconducting, for circuit convergence
assistance. |

`area=`*val* |
Scale factor that multiplies all currents and
other values, effectively modifying the MESFET area. |

`ic=`*vds*,*vgs* |
The initial voltages (initial condition)
for transient analysis. |

`icvds=`*vds* |
The initial `vds` (initial condition) for
transient analysis. |

`icvgs=`*vgs* |
The initial `vgs` (initial condition) for
transient analysis. |

- Examples:

`z1 7 2 3 zm1 off
`

zout 21 4 16 zmod1 area=5

The *nd*, *ng*, and *ns* are the drain, gate, and
source nodes, respectively. The *modname* is the model name,
*area* specifies the area factor, and `off` indicates an
initial condition of the device for dc analysis. If the area factor
is omitted, a value of 1.0 is assumed. The initial condition
specified using `ic` or alternatively `icvds` and `icvgs` are intended for use with the `uic` option in transient
analysis, when a transient analysis is desired starting from other
than the quiescent operating point. The `.ic` line provides
another way to set initial conditions.

** Next:** MESFET Models (both N
** Up:** Semiconductor Devices
** Previous:** JFET Models (both N
** Contents**
** Index**
Stephen R. Whiteley
2019-06-03