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I want to use a single sine gen and then phase shift it by 90. please help in this... Is it possible ? Please Help ?

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L K
L K 2016-8-31
回答： Pedro Manuel Carro Parafita 2019-3-1
i want to use a single sine gen and then phase shift it by 90.
please help in this...
And also i wanted to know how to design all pass filter
  2 个评论
Adam
Adam 2016-8-31
A 90-degree phase shifted sine wave is just a cosine wave. So if that is literally what you want to do then just create a cosine instead of a sine.
L K
L K 2016-8-31
but I have a sine wave gen and i will be giving a sine input to one block and phase shifted input to other block... Basically its just 1 sine wave block from which I am taking two signals to 2 blocks i.e one phase shifted and other just a plain sine wave

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采纳的回答

KSSV
KSSV 2016-8-31
t = linspace(0,2*pi) ;
x = sin(pi/4*t) ;
plot(t,x,'r')
hold on
x = sin(pi/4*t+pi/2) ; % phase shift by pi/2, which is same as cos
plot(t,x,'b')

更多回答（1 个）

Pedro Manuel Carro Parafita
You can use a hilbert transform and then take just the imaginary part of it.
x_shifted=imag(hilbert(x));

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