From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

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 1133/CH3/EX3.10/Example3_10.sce | 48 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100755 1133/CH3/EX3.10/Example3_10.sce

(limited to '1133/CH3/EX3.10/Example3_10.sce')

diff --git a/1133/CH3/EX3.10/Example3_10.sce b/1133/CH3/EX3.10/Example3_10.sce
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+//Example 3.10
+disp("Step 1: Identify topology")
+disp("  By shorting output voltage (Vo = 0), feedback voltage Vf becomes zero and hence it is voltage sampling. The feedback voltage is applied in series with the input voltage hence the topology is voltage series feedback.")
+disp("")
+disp("Step 2 and Step 3: Find input and output circuit.")
+disp("  To find input circuit, set Vo = 0. This places the parallel combination of resistor 10 K and 300 ohm at first source. To find output circuit, set Ii = 0. This places the resistor 10K and 300 ohm in series across the output. The resultant circuit is shown in fig.3.54.")
+disp("")
+disp("Step 4: Replace FET with its equivalent circuit as shown in fig.3.55.")
+disp("")
+disp("Step 5: Find open loop transfer gain.")
+disp("  Av = Vo / Vs = A_v1 * A_v2")
+disp("  A_v2 = -u*R_L2 / R_L2+r_d")
+rl2=(10.3*22)/(10.3+22)  // in k-ohm
+format(3)
+disp(rl2,"where  R_L2(in k-ohm) =")
+av2=(-50*7)/17
+format(6)
+disp(av2,"  A_v2 =")
+disp("  A_v1 = u*R_Deff / r_d+R_Deff+(1+u)*R_seff")
+rdeff=(22*1000)/(22+1000)  // in k-ohm
+disp(rdeff,"  R_Deff(in k-ohm) = R_D || R_G2 =")
+disp("  R_seff = 330 || 10K")
+av1=(-50*21.53)/(10+21.53+(51*((0.33*10)/(10+0.33))))
+disp(av1,"Therefore,  A_v1 =")
+av=-20.59*-22.51
+disp(av,"  Overall Av = A_v1 * A_v2 =")
+disp("")
+disp("Step 6: Calculate beta")
+beta=330/(330+10000)
+format(7)
+disp(beta,"  beta = Vf / Vo = Rs / Rs+Rf =")
+disp("")
+disp("step 7: Calculate D, A_vf, R_if, R''_of")
+d=1+(0.0319*463.5)
+disp(d,"  D = 1 + Av*beta =")
+avf=463.5/15.785
+format(6)
+disp(avf,"  A_vf = Av / D =")
+disp("Ri = R_G = 1 M-ohm")
+rif=15.785
+format(7)
+disp(rif,"  R_if(in k-ohm) = Ri * D =")
+ro=(10*7)/(10+7)  // in k-ohm
+format(6)
+disp(ro,"  R''o(in k-ohm) = rd || R_L2 =")
+rof=(4.118*10^3)/15.785  // in ohm
+format(4)
+disp(rof,"  R''_of(in ohm) = R''o / D =")
-- 
cgit