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+//Example9.4   // to determine the output frequency capacitor charging time of VCO

+clc;

+clear;

+close;

+Vcc = 12 ;

+Vcs = 6

+R = 10 ; // K ohm

+C = 1 ; // uF

+

+// the current through the control resistor R

+i =(Vcc-Vcs)/R ;

+disp('The current through the control resistor R is = '+string(i)+ ' mA ');

+

+// The charging time of capacitor 

+t = (0.25*Vcc*C)/i ;

+disp('The charging time of capacitor is = '+string(t)+ ' msec ');

+

+// In VCO the capacitor charging and discharging time period are equal ,so the total time period of tringular and square wave forms can be written as 2*t ;

+t = ((0.5*Vcc*C)/i);

+disp('The total time period of tringular and square wave is = '+string(t)+ ' msec ');

+

+// the output frequency of VCO is

+fo = 1/t ;

+disp('The output frequency of VCO is = '+string(fo)+ ' KHz ');