# Recent content by ng

1. ### Why should one use convolution ?

hi mike i am really new to dsp and control systems etc.and there is actually no one who can sit down and explain all this stuff to me.So u see its more of a self study.I am much dependent on the forum and replies from people like you. i shall see if i can get hold the book u mentioned.I am...
2. ### Why should one use convolution ?

hi berkeman Thanku for the response.I am actually learning control systems now and came across this DSP stuff in it. As far as i know DSP is way too hifi to begin in this priliminary stage.Is it not?So i tot i wud stick with understanding Control systems then move on to DSP.I have heard its...
3. ### Why should one use convolution ?

hello Why shud one use convolution ?Inorder to get the state transition matrix from x'=Ax+Bu x(t)=exp(at)x(0) + integral[exp(a(t-tau)) bu(tau) dtau where tau is the variable of convolution. i have read that convolution is used when integration is reqd,for instance,in capacitors and...
4. ### 3 phase power

thanx a lot russ,i really needed this. :smile:
5. ### 3 phase power

hey dlgoff thanx a lot.i shall look into each link and hopefully find what i am loking for and more. Thanx a loooooot!!!

hi es that is a very useful bit of info.I really needed it.Thanx for the same. :smile:
7. ### 3 phase power

Hi all, 3 phase power is measured using 2 and 3 wattmeter methods.Correct? can someone explain how these 2 work?I cudn get enuf info on it.

hi, Can someone suggest some good books in Control Systems engg. which includes all from laplace to bode plots,nyquist etc etc. Thanx for any help.
9. ### Q is the quality factor of series resonant circuits

Can someone tell me how to find the Quality factor of a loaded resonant circuit? PLEASEEEEEEEEEEthanks a lot.
10. ### Q is the quality factor of series resonant circuits

i am sorry to be a dumbo but i wish u spelled it out. :redface:
11. ### Q is the quality factor of series resonant circuits

Hi all I read that Q,the quality factor of series resonant circuits is wL/R ------------>1/R sqrt(L/C).This i understand 1.but for parallel resonant it is R/wL....hmm but why is that?this i don quite get. 2.Then what do u mean by loaded resonant circuit and unloaded resonant circuit...
12. ### Parallel RL circuit

okay sgt,now i get it. thanx a loooooooooooooot!
13. ### Parallel RL circuit

but then sgt,i also read that ip shud be assumed as acos(wt+phi) + bsin(wt+phi) not Kcos(wt+phi) as the supply is Vcos(wt+phi).they need not be in phase... i am confused now.
14. ### Parallel RL circuit

SGT,Thankyou very much indeed. I think i got the stuff in my head atlast. Thankyou. :smile:
15. ### Parallel RL circuit

how u get the steady state and coomplementary solution. i understood quite a few things from ur replies but not how to reach the final equations.i am going wrong whenever i try it. so cud u please help out?thanku again