Recent content by blighme

No need anymore, the discrete cosine/sine transforms do the trick.

Unfortunately, I was in a hurry to fight a headache last night, so I mixed up: real(n,t)=cos(...), imag=sin. Also, the resulting impulse response can't be a result of a simulation, for example, I can't just use u(sinc-1m) and then divide the pulses with a DFLOP -- that would require simulating...

Hello I don't know if this is the right place to place this, but here it goes: I tried an IDFT approach in LTspice, which doesn't know sqrt(-1). If z=a+i*b then, in LTspice, z=a, |z|=a, so b is lost. With this in mind, the IDFT is done with sin^2+cos^2 which gives me |sinc(x)|, but I need...

Thank you for the reply. Yes, and it's because I saw that I can't reduce that equation, in particular, to a 1st_order/1st_order+constant form (knowing my weak mathematical skills), that I thought there might be another way. What I obtained (after scribbling a page of notebook) was...

Hello I have a mathematical dilemma. How can the following transfer function be simplified: \frac{s^{2}+1}{s+1} in order to be able to have a 1st order nominator, maximum, compared to the denominator. But what if there is s^2(/<1...∞>) ? Is this possible? I know that the following...

Is there anyone who can help or knows about symmetrical components?

Hello Maybe this might help: www,onsemi,com/pub/Collateral/HBD855-D.PDF (I can't post links, yet, replace the commas with periods)Vlad

hubbat, truesearch put it plainly to you, if Wikipedia couldn't. If not, can you tell us what your reading values are, RMS and DC? Also, what did you expect to see at the output and what, in fact, you get. Even better, can you provide a simple schematic? They say a picture is worth a thousand...

Hello You might want to take a look at wikipedia's Rectifier (sorry, it won't let me insert links unless I have 10 posts). Vlad

That's what I meant, seing that you can't be sure about the potentiometers. What you are referring to is the third pin, the cursor. For the 10k one, it's connected to the upper pin, for the 47k -- business, as usual.

Hello Maybe it will be safer if you got to do this project with someone who can understand electronics and will be sitting next to you -- maybe even doing most of the work. I mean it, not in a menacing way, but in a considerate one.Vlad

Hello I am trying to model in LTspice a matrix for symmetrical components. Keeping to the theory, the 120° delays were built with tlines, which means that whatever signal there is at the input, after the delay it becomes x(t-2*π/3), meaning multiplying with a2(=e-j*2*π/3). (to avoid such a long...