blob: 7bccce15316c1d5c2c4527a0661834163c0f0df3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
//Example9.5 // to design VCO with output square wave pulse time of 50 msec
clc;
clear;
close;
Vcc =6 ;
Vcs = 5 ;
R = 22 ; //K ohm
C = 0.02 ; // uF
t = 50*10^-3 ; // sec output square wave pluse
// 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 ;
// the charging or discharging time of capacitor
tcap = t/2 ;
disp('The charging or discharging time of capacitor is = '+string(tcap)+ ' msec ');
// the output frequency of VCO is
fo = 1/t ;
disp('The output frequency of VCO is is = '+string(fo)+ ' Hz ');
// the output frequency of VCO
// fo = (1/4*R*C);
R = 1/(4*fo*C) ;
disp('The output frequency of VCO is = '+string(R)+ ' ohm');
// the current through the control resistor R
i =(Vcc-Vcs)/R ;
disp('The current through the control resistor R is = '+string(i)+ ' uA ');
// the capacitor charging current
// (V/t)=(i/C) ;
V = (i/C)*tcap ;
disp('The capacitor charging current is = '+string(V)+ ' V = 0.33Vcc ');
|
