Download - Wolfram Research

182 3. Reference Manual
A complex circuit
description.
In[2]:= amplifier = Circuit[
Netlist[
{V0, {VCC, 0}, Symbolic −> {AC−>0, _ −> VCC},
Value −> {DC | Transient −> 12}},
{V1, {1, 0}, Symbolic −> V1, Value −> {AC −> 1,
DC | Transient −> SinWave[Time, 0.8, 0.01, 1000]}},
{Q1, {2 −> C, 1 −> B, 0 −> E},
Model −> Model[BJT, DEFNPN, Q1],
Selector −> Selector[BJT, DEFNPN, Q1],
Parameters −> Parameters[BJT, DEFNPN, Q1],
GM$ac −> 0.02, RPI$ac −> 5.0*^3, RO$ac −> 1.0*^4},
{RC, {VCC, 2}, Value −> 500, Symbolic −> RC}
],
Model[Name −> BJT, Selector −> ACsimple,
Scope −> Global, Ports −> {C, B, E},
Parameters −> {gm, Rpi, Ro, GM$ac, RPI$ac, RO$ac},
Definition −> Netlist[
{RPI, {B, E}, Value −> RPI$ac, Symbolic −> Rpi},
{VC, {B, E, C, E}, Value −> GM$ac, Symbolic −> gm},
{RO, {C, E}, Value −> RO$ac, Symbolic −> Ro}
]
],
ModelParameters[Name −> DEFNPN, Type −> "NPN",
IS −> 1.0*^−16, BF −> 100, BR −> 1, VAF −> 150],
GlobalParameters[TEMP −> 300.15, GMIN −> 1.0*^−12]
]
Out[2]= Circuit
3.1.3 Netlist Entries
Netlist entries must be written in one of the following ways:
{refdes, {nodes}, value}
simple netlist entry format
{refdes, {nodes}, Value−>value, opts}
extended value field format for netlist entries
{refdes, {node −>port
, † † † }, Model−>name, Selector−>sel, par
−>val , † † † }
netlist entry format for model references
Netlist entry formats.
The reference designator (refdes) is a unique name (a symbol or a string) by which a circuit component
can be identified, such as R1 and CL for a resistor R and a load capacitor C L . For linear netlist
elements, the first one, two, or three letters of the reference designator (the type tag) determine the
type of the element (see Chapter 4.2 for a list of available linear element types). In the following,
the simple and extended netlist entry format is described. Section 3.1.8 describes the netlist format
for model references in more detail.