I don't quite understand, my book said that \delta(n) is 1 for n = 0 and 0 otherwise. now you're saying that it is infinity? is it dirac delta or kroneker delta? how should I distinguish? (on wikipedia, \delta[n] is kroneker and \delta(w) is dirak, so I should distinguish by [] and (), but in...
Thanks krome.
yes I meant w = 0, so for w=0 the sum doesn't converge. but I found such formula for DFTF of 1:
so for w=0 (and other 2πk numbers) I get 2π. did i get something wrong?
also, for w not equal to 2πk, I get 0, so that sum must converge to 0.
can you give any hint how should I...
Hello.
I'm stuck on calculating DTFT of 1.
DTFT formula is:
so dtft of 1 is:
1) in case of w=1, sum becomes:
doesn't it diverge?
2) in case of w no 1, how the hell should that sum be calculated?
thanks
Matlab
syms y(t) x(t) a t
Dy = diff(y);
A = dsolve(diff(y, 2) + 4*y == dirac(t), y(0) == 0, Dy(0) == -1);
ezplot(A, [0 10])
pretty(laplace(A))
I get something slightly different in matlab
Homework Statement
I'm given the transfer function of LTI system is \frac{1}{s^2 + 4}
Homework Equations
H(s) = \frac{Y(s)}{X(s)}
The Attempt at a Solution
first of all I had to find diff. equations of the system. I found that it's y'' + 4*y = x;
Then they asked to find such...
I have such MATLAB problem: I create variables R1 RF R2 and w so:
Code:
syms RF R1 R2 w
then I write expression:
Code:
3*R1*w*(RF + 200)/((R2*w*29*i + 3)*(3*R1*w - 2*i))
which gives:
Code:
(3*R1*w*(RF + 200))/((3*R1*w - 2*sqrt(-1))*(R2*w*29*sqrt(-1) + 3))
why sqrt(-1) and not i...
I have such MATLAB problem: I create variables R1 RF R2 and w so:
syms RF R1 R2 w
then I write expression:
3*R1*w*(RF + 200)/((R2*w*29*i + 3)*(3*R1*w - 2*i))
which gives:
(3*R1*w*(RF + 200))/((3*R1*w - 2*sqrt(-1))*(R2*w*29*sqrt(-1) + 3))
why sqrt(-1) and not i? furthermore? if I want real part...
Thanks jsgruszynski.
I know that it won't be "too much", but I'm planning to apply for masters degree there, and now I'm learning advanced physics + EE + computer sciences + a lot of math. As I have no time left for anything else, I am wondering if it's better to give up physics and spend more...
I am undergraduate first-year student from Georgia (country, not state of US). I am planning to continue learning in caltech or berkeley on electronics / mechanics faculty. I have been studying physics for 2 years by МГУ program (it's beside university), which used to be the best physics program...