charMOSExample.py

#!/usr/bin/env python
import sys
# ==================================================
# EDIT THE FOLLOWING PATH TO POINT TO YOUR DIRECTORY
# ==================================================
sys.path.append('/home/ashwith/Development/pyMOSChar')
# ==================================================

import charMOS
import numpy as np

# Specify the name of the MOSFET model. Simple way to do so
# is to create a schematic in Virtuoso that contains both
# nmos and pmos transistors. Then generate the netlist in
# ADE. You'll then be able to view the netlist and see what
# the name of the model is.
nmos = "CMOSN"
pmos = "CMOSP"

# Specify the MOSFET width in microns.
width = 1


# Specify the MOSFET lengths you're interested
# in. The following code creates an array of
# values from 0.1 to 5.1 in steps of 0.1. Note
# that the arange() function omits the last value
# so if you call np.arange(0.1, 5.1, 0.1), the
# last value in the array will be 0.5.
# MOS lengths are in microns. Don't keep the
# step size too small. Fine steps will use a 
# LOT of RAM can cause the machine to hang!
#                     start, stop, step
mosLengths = np.arange(0.1, 5.1, 0.1)

## Example 2 for lenghs
#mosLengths = np.concatenate(
#np.arange(0.1, 1, 0.1),
#np.arange(1, 10, 0.5),
#np.arange(10, 100, 10))

# Initialize the characterization process. Modify
# the values below as per your requirements. Ensure
# that the step values aren't too small. Otherwise
# your RAM will get used up.
charMOS.init(
simulator='ngspice',
mosLengths=mosLengths,
modelFiles=("/home/ashwith/Development/pyMOSChar/pdk.mod",),
modelN=nmos,
modelP=pmos,
simOptions="",
corners=("",),
subcktPath="",
datFileName="mosPDK_90_W{0}u.dat".format(width),
vgsMax=1,
vgsStep=20e-3,
vdsMax=1,
vdsStep=20e-3,
vsbMax=1,
vsbStep=20e-3,
numfing=1,
temp=300,
width=width)

# This function call finally generates the required database.
charMOS.genDB()