1 files changed, 32 insertions, 0 deletions
diff --git a/61/CH10/EX10.9/ex10_9.sce b/61/CH10/EX10.9/ex10_9.sce
new file mode 100755
index 000000000..1342b9621
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+//ex10.9
+B_ac=100;
+r_e=16;
+R1=62*10^3;
+R2=22*10^3;
+R_S=600;
+R_E=1*10^3;
+R_C=2.2*10^3;
+R_L=10*10^3;
+C1=0.1*10^-6;
+C2=10*10^-6;
+C3=0.1*10^-6;
+//input RC circuit
+R_in=(B_ac*r_e*R1*R2)/(B_ac*r_e*R1+B_ac*r_e*R2+R1*R2);
+f_c_input=1/(2*%pi*(R_S+R_in)*C1);
+disp(f_c_input,'input frequency in hertz')
+//For bypass circuit; Base circuit impedance= parallel combination of R1, R2, R_S
+R_th=(R1*R2*R_S)/(R1*R2+R2*R_S+R_S*R1);
+//Resistance looking at emitter
+R_in_emitter=r_e+(R_th/B_ac);
+//resistance of equivalent bypass RC is parallel combination of R_E,R_in_emitter
+R=(R_in_emitter*R_E)/(R_E+R_in_emitter);
+f_c_bypass=1/(2*%pi*R*C2);
+disp(f_c_bypass,'critical frequency of bypass RC circuit in hertz')
+f_c_output=1/(2*%pi*(R_C+R_L)*C3)
+disp(f_c_output,'output frequency circuit in hertz')
+R_c=R_C*R_L/(R_C+R_L);
+A_v_mid=R_c/r_e;
+attenuation=R_in/(R_in+R_S);
+A_v=attenuation*A_v_mid;    //overall voltage gain
+A_v_mid_dB=20*log10(A_v);    
+disp(A_v_mid_dB,'overall voltage gain in dB')
+\ No newline at end of file