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+// Determine approximate Rds
+// Basic Electronics
+// By Debashis De
+// First Edition, 2010
+// Dorling Kindersley Pvt. Ltd. India
+// Example 6-12 in page 287
+
+clear; clc; close;
+
+// Given data
+K=0.25*10^-3; // Constant in mA/V^2
+Vt=2; // Voltage in V
+Vgs=[4 6 10]; // Drain-source voltage in V
+
+// Calculation
+for i=1:3
+    rds=1/(2*K*(Vgs(i)-Vt));
+    printf("Rds = %0.0f ohm\n",rds);
+end
+
+// Result
+// Rds = 1 K-ohm, 500 ohm, 250 ohm
+\ No newline at end of file
diff --git a/181/CH6/EX6.12/example6_12.txt b/181/CH6/EX6.12/example6_12.txt
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+ Rds = 1000 ohm
+Rds = 500 ohm
+Rds = 250 ohm
+ 
+\ No newline at end of file