1 files changed, 24 insertions, 0 deletions
diff --git a/135/CH5/EX5.5/EX5.sce b/135/CH5/EX5.5/EX5.sce
new file mode 100755
index 000000000..2ffaf877b
--- /dev/null
+++ b/135/CH5/EX5.5/EX5.sce
@@ -0,0 +1,24 @@
+// Example 5.5: VCEQ, ICQ
+clc, clear
+VBE=0.7; // in volts
+betaf=120;
+// From Fig. 5.15
+VCC=20; // in volts
+VEE=20; // in volts
+R1=8.2e3; // in ohms
+R2=2.2e3; // in ohms
+RC=2.7e3; // in ohms
+RE=1.8e3; // in ohms
+// Using Thevnin's theorem to obtain equivalent circuit given in Fig. 5.16(b)
+RB=R1*R2/(R1+R2); // in ohms
+// From Fig. 5.16(a)
+I=(VCC+VEE)/(R1+R2); // in amperes
+VBB=I*R2-VEE; // in volts
+// Writing KVL for the base emitter loop and putting Ic= βF*Ib gives
+IB=(VEE+VBB-VBE)/(RB+(1+betaf)*RE); // in amperes
+IC=betaf*IB; // in amperes
+// KVL for the collector loop gives
+VCE=VCC+VEE-IC*(RC+RE)-IB*RE; // in volts
+IC=IC*1e3; // in mili-amperes
+disp(VCE,"VCEQ (V) =");
+disp(IC,"ICQ (mA) =");
+\ No newline at end of file