75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
from OPENCHAMS import *
|
|
|
|
circuit = Circuit(Name("design"), Name("myTech"))
|
|
# value parameters
|
|
circuit.addParameter(Name("temp"), 27.0 )
|
|
circuit.addParameter(Name("Vdd") , 1.2 )
|
|
circuit.addParameter(Name("Vss") , 0.0 )
|
|
circuit.addParameter(Name("L") , 0.1e-6)
|
|
circuit.addParameter(Name("Ids") , 30e-6 )
|
|
circuit.addParameter(Name("Veg") , 0.12 )
|
|
# equation parameters
|
|
circuit.addParameter(Name("complex"), "myEq")
|
|
|
|
# netlist :
|
|
netlist = circuit.createNetlist()
|
|
# instances
|
|
# nmos1
|
|
inst_nmos1 = netlist.addInstance("nmos1", "Transistor", "NMOS", True)
|
|
inst_nmos1.addConnector("G")
|
|
inst_nmos1.addConnector("S")
|
|
inst_nmos1.addConnector("D")
|
|
tr_nmos1 = inst_nmos1.addTransistor("m1")
|
|
tr_nmos1.gate = "G" # the name of the connector of inst_nmos1
|
|
tr_nmos1.source = "S"
|
|
tr_nmos1.drain = "D"
|
|
tr_nmos1.bulk = "S"
|
|
# pmos1
|
|
inst_pmos1 = netlist.addInstance("pmos1", "Transistor", "PMOS", True)
|
|
inst_pmos1.addConnector("G")
|
|
inst_pmos1.addConnector("S")
|
|
inst_pmos1.addConnector("D")
|
|
tr_pmos1 = inst_pmos1.addTransistor("m1")
|
|
tr_pmos1.gate = "G" # the name of the connector of inst_pmos1
|
|
tr_pmos1.source = "S"
|
|
tr_pmos1.drain = "D"
|
|
tr_pmos1.bulk = "S"
|
|
# nets
|
|
_vdd = netlist.addNet("vdd", "power" , True)
|
|
_vss = netlist.addNet("vss", "ground" , True)
|
|
_in = netlist.addNet("in" , "logical", True)
|
|
_out = netlist.addNet("out", "logical", True)
|
|
_vdd.connectTo("pmos1", "S")
|
|
_vss.connectTo("nmos1", "S")
|
|
_in.connectTo ("nmos1", "G")
|
|
_in.connectTo ("pmos1", "G")
|
|
_out.connectTo("nmos1", "D")
|
|
_out.connectTo("pmos1", "D")
|
|
# schematic
|
|
schematic = circuit.createSchematic(1.0)
|
|
schematic.addInstance("nmos1", 2490, 2600, "ID")
|
|
schematic.addInstance("pmos1", 2490, 2300, "ID")
|
|
# sizing
|
|
sizing = circuit.createSizing()
|
|
op_pmos1 = sizing.addOperator("pmos1", "OPVG(Veg)" , "BSIM3V3", 0)
|
|
op_pmos1.addConstraint("Temp", "design", "temp")
|
|
op_pmos1.addConstraint("Ids" , "design", "Ids" )
|
|
op_pmos1.addConstraint("L" , "design", "L" )
|
|
op_pmos1.addConstraint("Veg" , "design", "Veg" )
|
|
op_pmos1.addConstraint("Vd" , "design", "Vdd", 0.5)
|
|
op_pmos1.addConstraint("Vs" , "design", "Vdd" )
|
|
op_nmos1 = sizing.addOperator("nmos1", "OPW(Vg,Vs)", "BSIM3V3", 1)
|
|
op_nmos1.addConstraint("Temp", "design", "temp")
|
|
op_nmos1.addConstraint("Ids" , "design", "Ids" )
|
|
op_nmos1.addConstraint("L" , "design", "L" )
|
|
op_nmos1.addConstraint("Vs" , "design", "Vdd" )
|
|
op_nmos1.addConstraint("Vg" , "pmos1" , "Vg" )
|
|
op_nmos1.addConstraint("Vd" , "pmos1" , "Vd" )
|
|
op_nmos1.addConstraint("another", "myEq", -2.5 )
|
|
# layout
|
|
layout = circuit.createLayout()
|
|
layout.addInstance("pmos1", "Common transistor")
|
|
layout.addInstance("nmos1", "Rotate transistor")
|
|
|
|
circuit.writeToFile("./myInverter.xml")
|