====== Basic device syntax ======

This page applies to the simple "Spice" basic devices, and some extended forms of them.
==== Spice format ====

The format for simple devices is:

  label  (connections)  value

Parentheses around the connections are optional.

Examples:

  Vin     (in 0)   10
  Lseries (in out) .01
  Cshunt  (out 0)  100u
  Rload   (out 0)  100

The first letter of the label determines the type:


^2 terminal devices ^^^^
^letter ^type                              ^value             ^syntax                        ^
|C      |capacitor                         |capacitance q/v   |Cxxxx (p n) capacitance       |
|L      |inductor                          |inductance flux/i |Lxxxx (p n) inductance        |
|R      |resistor                          |resistance v/i    |Rxxxx (p n) resistance        |
|Y      |admittance                        |admittance i/v    |Yxxxx (p n) admittance        |
|V      |fixed voltage source              |DC voltage        |Vxxxx (p n) voltage           |
|I      |fixed current source              |DC current        |Ixxxx (sink src) current      |

^4 terminal devices ^^^^
^letter ^type                              ^value             ^syntax                        ^
|E      |voltage controlled voltage source |gain vout/vin     |Exxxx (p n ps ns) gain        |
|G      |voltage controlled current source |gm   iout/vin     |Gxxxx (sink src ps ns) gm     |
|H      |current controlled voltage source |rm   vout/iin     |Hxxxx (p n control) gain      |
|F      |current controlled current source |gain iout/iin     |Fxxxx (sink src control) gain |

^devices with special syntax ^^^^
^letter ^type                              ^value             ^syntax                        ^
|G      |voltage controlled resistor       |R/vc              |Gxxxx (p n ps ns) vcr value   |
|G      |voltage controlled admittance     |Y/vc              |Gxxxx (p n ps ns) vcg value   |
|G      |voltage controlled capacitor      |C/vc              |Gxxxx (p n ps ns) vccap value |
|C      |trans-capacitor                   |Qout/vin          |Cxxxx (p n ps ns) tcap value  |

^Port names ^^
|p       |positive node or positive output        |
|n       |negative node or negative output        |
|sink    |current sink or current sink output     |
|source  |current source or current source output |
|ps      |positive input or control voltage node  |
|ns      |negative input or control voltage node  |
|control |current probe controlling element       |

==== Spectre format ====

The format for simple devices is:

  label  (connections)  type  parameter=value  

Examples:

  Vin     (in 0)   vsource   dc=10
  Lseries (in out) inductor  l=.01
  Cshunt  (out 0)  capacitor c=100u
  Rload   (out 0)  resistor  r=100

The device type is determined by the type field.  The first letter of the label doesn't matter.
==== Verilog format ====

The format for simple devices is:

  type #(.parameter(value)) label (connections);
or
  type #(value) label (connections);

Examples:

  vsource   #(.dc(10))  Vin     (.p(in), .n(0));
  inductor  #(.l(.01))  Lseries (.p(in), .n(out));
  capacitor #(.c(100u)) Cshunt  (.p(out), .n(0));
  resistor  #(.r(100))  Rload   (.p(out), .n(0));

  vsource   #(.dc(10))  Vin     (in, 0);
  inductor  #(.l(.01))  Lseries (in, out);
  capacitor #(.c(100u)) Cshunt  (out, 0);
  resistor  #(.r(100))  Rload   (out, 0);

  vsource   #(10)   Vin     (in, 0);
  inductor  #(.01)  Lseries (in, out);
  capacitor #(100u) Cshunt  (out, 0);
  resistor  #(100)  Rload   (out, 0);