1 files changed, 20 insertions, 0 deletions
diff --git a/863/CH12/EX12.4/Ex12_4.txt b/863/CH12/EX12.4/Ex12_4.txt
new file mode 100644
index 000000000..5351ec93b
--- /dev/null
+++ b/863/CH12/EX12.4/Ex12_4.txt
@@ -0,0 +1,20 @@
+//Caption:Design a interface circuit for CMOS
+//Ex12.4
+clc; 
+clear;
+close;
+Vdd=15//Drain voltage(in volts)
+Rd=1//Drain resistance(in kilo ohm)
+Vcc=5//Supply voltage(in volts)
+Ih=40//Current(in micro ampere)
+hfe=20
+Vce=0.2//Saturated collector emitter voltage(in volts)
+vih=2//High input voltage(in volts)
+il=1.6//Low input current
+Vbe=0.7//Base emitter voltage(in volts)
+Rc=(Vcc-vih)*1000/(2*Ih)
+Ic=((Vcc-Vce)/Rc)+(2*il)
+Ib=Ic/hfe
+R=(Vdd-Vbe)/Ib
+Rb=R-Rd
+disp(Rc,Rb,'Components required to design circuit are resistors Rb and Rc(in kilo ohm)=')
+\ No newline at end of file