1 files changed, 37 insertions, 0 deletions
diff --git a/3710/CH7/EX7.3/Ex7_3.sce b/3710/CH7/EX7.3/Ex7_3.sce
new file mode 100644
index 000000000..a9ec66e7b
--- /dev/null
+++ b/3710/CH7/EX7.3/Ex7_3.sce
@@ -0,0 +1,37 @@
+//Example 7.3, Page Number 311
+//The Function fpround(dependency) is used to round a floating point number x to n decimal places
+//Minimum detectable signal
+clc;
+
+A=1000*(10**-6) //Cathode Area in metre square
+wf=1.25 //Work function in eV
+T=300 //Cathode temperature in Kelvin
+e=1.6*(10**-19) //Charge of an electron in Coulombs
+k=1.38*(10**-23) //Boltzman Constant in meter square kilogram per second square Kelvin
+a1=1.2*(10**6) //constant for pure metals in Ampere per metre square kelvin square
+l=0.5*(10**-6) //Wavelength in meters
+q=0.25 //Quantum Efficiency
+h=6.63*(10**-34) //Plancks Constant in meter square kilogram per second
+c=3*(10**8) //Speed of light in meters per second
+f=1//bandwidth in hertz
+
+//From equation 7.11
+e1=(k*T)/e 
+e1=fpround(e1,3)
+c2=(-1*wf)/e1
+c2=fpround(c2,4)
+c3=exp(c2)
+it=a1*A*(T**2)*c3 //it is the current generated in Amperes
+
+mprintf("The Thermionic Emission Current is:%.2e A\n",it)
+
+//Using Equation 7.9
+r=(q*e*l)/(h*c) //r is the responsivity in A/W
+r=fpround(r,2)
+mprintf(" The Responsivity is:%0.1f A/W\n",r)
+
+//Using Equation 7.13
+W=(sqrt(2*it*e*f))/r //W is the minimum detectable power in Watts
+mprintf(" The Minimum detectable signal power is:%.3e W",W)
+
+//The answer provided in the textbook is wrong