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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 /68/CH6/EX6.12 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '68/CH6/EX6.12')
| -rwxr-xr-x | 68/CH6/EX6.12/ex12.sce | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/68/CH6/EX6.12/ex12.sce b/68/CH6/EX6.12/ex12.sce new file mode 100755 index 000000000..ca344dadf --- /dev/null +++ b/68/CH6/EX6.12/ex12.sce @@ -0,0 +1,84 @@ +// Example 6.12 : Comparison between Cascode amplifier and CS amplifier
+// 6.12a
+// CS amplifier
+g_m=1.25*10^-3;
+r_o=20*10^3;
+R_L=r_o*r_o/(r_o+r_o);
+C_gs=20*10^-15;
+R_sig=10000;
+C_gd=5*10^-15;
+C_L=5*10^-15;
+C_db=5*10^-15;
+A_o=g_m*r_o;
+disp(A_o,"A_o (V/V)")
+A_v=-A_o/2;
+disp(A_v,"A_v (V/V)")
+T_H=C_gs*R_sig+C_gd*[(1+g_m*R_L)*R_sig+R_L]+(C_L+C_db)*R_L;
+disp(T_H,"T_H (s)")
+f_H=1/(2*%pi*T_H);
+disp(f_H,"f_H (Hz)")
+f_t=-A_v*f_H;
+disp(f_t,"f_t (Hz)")
+// Cascode amplifier
+g_m1=1.25*10^-3;
+r_o1=20000;
+X=0.2;
+r_o2=20000;
+R_L=20000;
+A_o1=g_m1*r_o1;
+disp(A_o1,"A_o1 (V/V)")
+gm2plusgmb2=g_m1+X*g_m;
+A_vo2=1+(gm2plusgmb2)*r_o2;
+disp(A_vo2,"A_vo2 (V/V)")
+R_out1=r_o1;
+R_in2=1/(gm2plusgmb2)+R_L/A_vo2;
+disp(R_in2,"R_in2 (ohm)")
+R_d1=R_out1*R_in2/(R_out1+R_in2);
+disp(R_d1,"R_d1 (ohm)")
+R_out=r_o2+A_vo2*r_o1;
+disp(R_out,"R_out (ohm)")
+vo1byvi=-g_m1*R_d1;
+disp(vo1byvi,"(v_o1/v_i) (V/V)")
+A_v=-A_o1*A_vo2*R_L/(R_L+R_out);
+disp(A_v,"A_v (V/V)")
+C_gs1=20*10^-15;
+R_sig=10*10^3;
+gm1Rd1=1.5;
+C_gd1=5*10^-15;
+C_gs2=20*10^-15;
+C_db2=5*10^-15;
+C_gd2=5*10^-15;
+C_db1=5*10^-15;
+T_H=R_sig*[C_gs1+C_gd1*(1+gm1Rd1)]+R_d1*(C_gd1+C_db1+C_gs2)+((R_L*R_out)/(R_L+R_out))*(C_L+C_db2+C_gd2);
+f_H=1/(2*%pi*T_H);
+disp(T_H,"T_H (s)")
+disp(f_H,"f_H (Hz)")
+f_t=-A_v*f_H;
+disp(f_t,"f_t (Hz)")
+// 6.12b
+// CS amplifier
+A_v=-12.5;
+R_L=10*10^3;
+disp(A_v,"A_v (V/V)")
+T_H=(C_gd+C_L+C_db)*R_L;
+disp(T_H,"T_H (s)")
+f_H=1/(2*%pi*T_H);
+disp(f_H,"F_H (Hz)")
+f_t=-A_v*f_H;
+disp(f_t,"f_t (Hz)")
+// Cascode amplifier
+R_L=640*10^3;
+R_out=640*10^3;
+R_out1=20*10^3;
+A_v=-A_o1*A_vo2*R_L/(R_L+R_out);
+disp(A_v,"A_v (V/V)")
+R_in2=1/gm2plusgmb2+R_L/A_vo2;
+disp(R_in2,"R_in2 (ohm)")
+R_d1=R_in2*R_out1/(R_in2+R_out1);
+disp(R_d1,"R_d1 (ohm)")
+T_H=R_d1*(C_gd1+C_db1+C_gs2)+(R_L*R_out/(R_L+R_out))*(C_L+C_gd2+C_db2);
+disp(T_H,"T_H (s)")
+f_H=1/(2*%pi*T_H);
+disp(f_H,"f_H (Hz)")
+f_t=-A_v*f_H;
+disp(f_t,"f_t (Hz)")
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