1 files changed, 43 insertions, 0 deletions
diff --git a/3492/CH6/EX6.7/Ex6_7.sce b/3492/CH6/EX6.7/Ex6_7.sce
new file mode 100644
index 000000000..2b349db63
--- /dev/null
+++ b/3492/CH6/EX6.7/Ex6_7.sce
@@ -0,0 +1,43 @@
+clc
+//Chapter6
+//Ex_7
+//Given
+//part(a)
+Th=250*10^-9 //in seconds
+A=0.02*10^-2 //in cm2
+Av=10 //voltage gain
+ni=1.45*10^10 //in cm^-3
+Nd=2*10^16 //in cm^-3
+W_B=2*10^-4 //in cm
+uh=410 //in cm2/V/s
+I_E=2.5*10^-3 //in Amperes
+//let K=kT/e
+K=0.0259 //in V
+//Dh=(kT/e)*uh
+Dh=K*uh
+Tt=W_B^2/(2*Dh)
+e=1.6*10^-19 // in coulombs
+alpha=1-(Tt/Th)
+disp(alpha,"CB current transfer ratio is")
+funcprot(0)
+beta=alpha/(1-alpha)
+disp(beta,"current gain is")
+//part(c)
+I_EO=e*A*Dh*ni^2/(Nd*W_B)
+//V_EB=(k*T/e)*log(I_E/I_EO)
+V_EB=(K)*log(I_E/I_EO)
+disp(V_EB,"V_EB in volts is")
+//re=(k*T/e)/IE=25/IE(mA)
+I_E=2.5 //in mA
+re=25/I_E
+disp(re,"small signal input resistance in ohms is")
+//part(d)
+R_C=Av*re
+disp(R_C,"R_C in ohms is")
+//part(e)
+I_E=2.5*10^-3 //in Amperes
+I_B=I_E*(1-alpha)
+disp(I_B*10^6,"base current in micro amperes is")
+//part(f)
+f=1/Tt
+disp(f*10^-6,"upper frequency range limit in MHz is")