# PSPICE SYNTAX & COMMAND SUMMARY

### R - Resistor

General Format :
R|name| |+ node| |- node| {model name} |value|
The |+ node| and |- node| define the polarity of the resistor
in terms of the voltage drop across it. Positive current flows from
the |+ node| thru the resistor and out the |- node|.
{model name} is optional and if not included then |value| is
the resistance in ohms. If {model name} is specified and TCE
is not specified then the resistance is given by :
Rtot = |value|*R*[1+TC1*(T-Tnom))+TC2*(T-Tnom)^2]
where R, TC1, and TC2 are described below.
Rtot is the total resistance, T is the simulation temperature and
Tnom is the nominal temperature (27C unless set by .OPTIONS TNOM command)
If TCE is specified then the resistance is given by :
Rtot = |value|*R*1.01^(TCE*(T-Tnom))
|value| can either be positive or negative.
Noise is calculated using a 1 Hz bandwidth. The resistor generates
thermal noise with the following spectral power density (per unit BW) :
i^2 = 4*k*T/resistance
where k is Boltzmann's constant.
Model Parameters :
Name Description
------- -------------------------------------------------------
R resistance multiplier
Default value = 1
TC1 linear temperature coefficient
Default value = 0 ; Units = ¡C^-1
TC2 quadratic temperature coefficient
Default value = 0 ; Units = ¡C^-2
TCE exponential temperature coefficient
Default value = 0 ; Units = %/¡C
Example :
R1 1 0 20
defines a 20 ohm resistor between nodes 1 and 0.

**COMPONENTS**

B C
D E
F G
H I
J K
L M
Q R
S T
V W
X Sources

**COMMANDS**

* ;
+ .AC
.DC .END
.ENDS .FOUR
.IC .INC
.LIB .MC
.MODEL .NODESET
.NOISE

.OP
.OPTIONS .PLOT
.PRINT .PROBE
.SENS .SUBCKT
.TEMP .TF
.TRAN .WIDTH