Qxxxxxxx

Semiconductor BJT Device. This device is translated as one of the following:

a nonlinear NPN or PNP BJT device
a nonlinear NPN or PNP BJT device with substrate
a NPN or PNP VBIC (Vertical Bipolar Inter-Company) device

For information on the BJT model, refer to [BJT_Model:Bipolar Transistor Model]. For information on the VBIC model, refer to [VBIC_Model:VBIC Model].

Note For HSpice, if the referenced model has Level=4, the appropriate VBIC device is placed.

Example SPICE Command Line:

q1 1 2 3 Qmodel 2 OFF IC=0.6, 5.0}}
q2 1 2 3 4 Qmodel2 1.0

SPICE dialect and netlist syntax:

Spice2/3:

qid nc nb ne [ns] mname[ area ] [OFF] [ IC= vbe, vce ] [ TEMP=temp ]

PSpice:

qid nc nb ne [ ns ] mname[area]

HSpice:

qid nc nb ne [ ns ] mname [[AREA=] area ] [ AREAB= area]
+ [AREAC=area] [OFF] [[IC=vbe, vce] | [VBC=vbc [VCE=vce]]]
+ [M=mult] [DTEMP=temp]

ADS Netlist Syntax:

BJT[4] mname: qid nc nb ne [ns] [Area=area] [Temp=temp+dtemp]
+ [Region=0] [_M=mult]

VBIC mname : qid nc nb ne ns [scale=area]

ADS Schematic Symbols:

Instance Parameters:

qid = BJT element name
mname = Model name
nc = Collector node
nb = Base node
ne = Emitter node
ns = Substrate node
area = Area factor (default=1)
off = Indicates an initial condition on the device for dc analysis.
Translates to Region=0
mult = Multiplier used to simulate multiple parallel devices.
temp = The temperature at which this device is to operate.

Comments:

The referenced [BJT_Model:Bipolar Transistor Model] or [VBIC_Model:VBIC Model] model is read to determine which device to use:

NPN keyword indicates BJT_NPN, BJT4_NPN or VBIC_NPN
PNP keyword indicates BJT_PNP, BJT4_PNP or VBIC_PNP

If SCALE is specified, Value=Value*scale

If dtemp is provided, Temp=temp+dtemp