Chapter12:MONOLITHIC MICROWAVE INTEGRATED CIRCUITS

Eg12.4.1:pg-534

In [7]:
#calculate the planar resistance
l=10*(10**-3)     #resistive film length in meter
ps=2.44*(10**-8)  #sheet resistivity of gold film in ohms-meter
w=10*(10**-3)     #resistive film width in meter
t=0.1*(10**-6)     #resistive fim thickness in meter
R=(l*ps)/(w*t) 
print"The planar resistance(in ohms/square)is =",round(R,3),"ohms/square"
The planar resistance(in ohms/square)is = 0.244 ohms/square

Eg12.4.2:pg-536

In [6]:
#compute the inductance
n=5   #number of turns
w=50  #film width in mils
s=100 #separation in mils
d0=2.5*n*(w+s) 
L=0.03125*(n**2)*d0 
print"The inductance(in (nH/mil))is =",round(L,2),"nH/mil"
The inductance(in (nH/mil))is = 1464.84 nH/mil

Eg12.4.3:pg=537

In [5]:
#compute the capacitance
N=8         #number of fingers
er=13.10    #relative dielectric constant of GaAs
h=0.254     #substarte height in cm
l=0.00254   #finger length in cm
w=0.051     #finger base width in cm
A1=0.089    #contribution of interior finger for h>w in pF/cm
A2=0.1      #contribution of two external fingers for h>w in pF/cm
C=((er+1)*l*((A1*(N-3))+A2))/w 
print"The Capacitance(in (pF/cm)is =",round(C,3),"pF/cm"  #calculation mistake in book
The Capacitance(in (pF/cm)is = 0.383 pF/cm