Commit eec06f5a authored by natsfr's avatar natsfr

git crap

parents a43aaa9c c6a3b226
<<<<<<< HEAD
# -*- coding: utf-8 -*-
"""
Space Baron Team
......@@ -138,3 +139,145 @@ if __name__ == '__main__':
q1.calc_stability_mag()
q1.calc_gum()
print("GUM: %fdB" % q1.GUM)
=======
# -*- coding: utf-8 -*-
"""
Space Baron Team
nats`
Transistor Auto Matcher
Take S parameters file input
"""
import os
import sys
import math
import cmath
class TransistorBlock:
def __init__(self, file, freq, config):
self.freq = freq
self.config = config
self.spformats = {}
self.parse_spar(file,freq)
''' Open S2P Files and extract data '''
def parse_spar(self, file, freq):
f = open(file, "r")
tmpspars = []
for line in f:
if line.startswith("#"):
sfor = line.strip().split()
self.spformats["UNIT"] = sfor[1]
self.spformats["TYPE"] = sfor[2]
self.spformats["FORMAT"] = sfor[3]
# Apparently the nominal Impedance is splitted: R 50
self.spformats["R"] = sfor[5]
elif not line.startswith("!"):
tmpspars.append(line.strip().split())
# Parse options: we mainly need to know unit and complex format
# http://cp.literature.agilent.com/litweb/pdf/genesys200801/sim/linear_sim/sparams/touchstone_file_format.htms
self.spars = {}# 1: Freq 2: S11 3: S21 4: S12 5: S22
for l in tmpspars:
if(l[0] != "!" and l[0] != "#"):
tmp = []
if self.spformats["FORMAT"] == "RI" : # Real Imaginary
tmp.append(complex(float(l[1]), float(l[2]))) # S11
tmp.append(complex(float(l[3]), float(l[4]))) # S21
tmp.append(complex(float(l[5]), float(l[6]))) # S12
tmp.append(complex(float(l[7]), float(l[8]))) # S22
elif self.spformats["FORMAT"] == "MA" : # Magnitude Angle
tmp.append(cmath.rect(float(l[1]), float(l[2]))) # S11
tmp.append(cmath.rect(float(l[3]), float(l[4]))) # S21
tmp.append(cmath.rect(float(l[5]), float(l[6]))) # S12
tmp.append(cmath.rect(float(l[7]), float(l[8]))) # S22
else :
print("Unsupported Number Format: %s" % self.spformats["FORMAT"])
exit(-1)
# We always set freq to MHz
freq = float(l[0])
if self.spformats["UNIT"] == "GHz":
freq = freq * 1000
elif self.spformats["UNIT"] == "KHz":
freq = freq / 1000
elif self.spformats["UNIT"] == "Hz":
freq = freq / 1000000
self.spars[freq] = tmp
''' Calculate John Rollett stability factor '''
def calc_stab(self):
S = self.S
self.K = (1 + cmath.polar(self.Ds)[0] ** 2 - cmath.polar(S[11])[0] ** 2 - \
cmath.polar(S[22])[0] ** 2) / (2 * cmath.polar(S[21])[0] * cmath.polar(S[12])[0])
''' Caculate Maximum Available Gain '''
def calc_mag(self):
S = self.S
self.B1 = 1 + cmath.polar(S[11])[0] ** 2 - cmath.polar(S[22])[0] ** 2 - cmath.polar(self.Ds)[0] ** 2
ksq = 0.0
if self.B1 < 0 :
ksq = math.sqrt(self.K**2 - 1)
else :
ksq = math.sqrt(self.K**2 - 1) * -1
self.MAG = 10 * math.log(cmath.polar(S[11])[0] / cmath.polar(S[12])[0]) + \
10 * math.log(self.K + ksq)
''' Calculate Maximum Unilateral Gain (S12 = 0)'''
def calc_gum(self):
S = self.S
self.GUM = 10 * math.log(cmath.polar(S[21])[0]**2 / ((1-cmath.polar(S[11])[0]**2)*(1-cmath.polar(S[22])[0]**2)))
def set_freq(self, freq):
self.freq = freq
def calc_stability_mag(self):
self.sparam = self.spars[self.freq]
self.S = {}
self.S[11] = self.sparam[0]
self.S[21] = self.sparam[1]
self.S[12] = self.sparam[2]
self.S[22] = self.sparam[3]
S = self.S
self.Ds = S[11] * S[22] - S[12] * S[21]
self.calc_stab()
if self.K < 1 :
print("Warning ! K factor %f < 1.0 , amplifier could be unstable" % self.K)
print("Undefined Maximum Available Gain")
else :
print("Stable amplifier design. K factor %f >= 1" % self.K)
self.calc_mag()
print("Maximum Available Gain: %fdB" % self.MAG)
def calc_scm(self):
S = self.S
if self.K > 1 :
self.C1 = S[11] - (self.Ds * complex.conjugate(S[22]))
self.C2 = S[22] - (self.Ds * complex.conjugate(S[11]))
# B1 is already calculated for MAG
self.B2 = 1 - cmath.polar(S[11])[0] ** 2 - cmath.polar(S[22])[0] ** 2 - cmath.polar(self.Ds)[0] ** 2
else :
print("Can't calculate SCM, K < 1, try lossy match")
if __name__ == '__main__':
if(len(sys.argv) < 4):
print("Error: usage\nauto_match.py spar_file.s2p frequency configuration\n")
exit(-1)
fname = sys.argv[1]
freq = float(sys.argv[2])
config = sys.argv[3]
q1 = TransistorBlock(fname, freq, config)
q1.calc_stability_mag()
q1.calc_gum()
print("GUM: %fdB" % q1.GUM)
>>>>>>> c6a3b226a6923c3e6b87643ff9743810129ce2a4
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