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How do you find Carrier Amplitude for given AM wave signal

S

sam

Jan 1, 1970
0
hi i am tryig to calculte this
y1(t) = A(1+mcos(2pi5000t))cos (2pi80000t)

and have to find minimum value of A when y1(t) is greater than or
equal to .2V for all t
how do you find that i have simplified that equation using trig
iden...but still not sure how to find that A
please help
thank u
 
I

iQbal

Jan 1, 1970
0
Cosine will not exceed +/- 1
Sine will not exceed +/- 1
Therefore
the positive peak would be +A + Am = A(1+m);
The neagtive peak would be be -A(1+m);

iQbal
 
B

Bob Stephens

Jan 1, 1970
0
Cosine will not exceed +/- 1
Sine will not exceed +/- 1
Therefore
the positive peak would be +A + Am = A(1+m);
The neagtive peak would be be -A(1+m);

iQbal

And thank the nice man for doing your homework.
 
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