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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /752/CH5/EX5.4.2 | |
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initial commit / add all books
Diffstat (limited to '752/CH5/EX5.4.2')
| -rwxr-xr-x | 752/CH5/EX5.4.2/5_4_2.sce | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/752/CH5/EX5.4.2/5_4_2.sce b/752/CH5/EX5.4.2/5_4_2.sce new file mode 100755 index 000000000..b07448f95 --- /dev/null +++ b/752/CH5/EX5.4.2/5_4_2.sce @@ -0,0 +1,29 @@ +clc;
+//page no 163
+// problem no 5.4.2
+//Resonating freq of a tuned ckt of a CE amplifier is 5MHz
+f=5*10^6;//in Hz
+w0=2*%pi*f;
+Q=100;//Q-factor of the ckt
+L=2*10^-6;//inductance expressed in H
+Rs=1000;//source resistance in ohm
+Ic=500*10^-6;//transister collector current in A
+Vt=26*10^-3;//thermal voltage in V
+hfe=200;
+C_be=10*10^-12;//in pF
+// refer to problem 5.4.1
+Av=78;
+Cm=47;
+gm=Ic/Vt;
+r_be=hfe/gm;
+// The dynamic resistance of the tuned ckt is
+RD1=Q*w0*L;
+//The effective dynamic conductance is
+RD1eff_1=(1/Rs)+(1/RD1)+(1/r_be);
+RD1_eff=1/RD1eff_1
+// Tha effective Q-factor is
+Qeff=RD1_eff/(w0*L);
+disp(Qeff,'The effective Q-factor is');
+// The voltage gain refered to source is
+Avs=RD1_eff*Av/Rs;
+disp(Avs,'The voltage gain is');
\ No newline at end of file |