Recent content by tinhnho

nevermind, i think i got it here what i did 0x1 + 0x16 +0x(16^2) + 0x(16^3) +0x(16^4) +5x(16^5) +0x(16^6) +3x(16^7) =810549248 the result matchs with the calculator. thanks :)

here what i have for Hex 30500000 => Dec = 1052672 (16^3 + 16^5= 1052672) my result seem doesn't right !:confused: I confuse, would you give a example by number instead by words? Don't need to be exacted those hex number above, any number would fine with me, i will follow from there and try...

edited..thanks for your help

3rd other butterworth polynomial: (s+1)(s^2+s+1) 4th order: (s^2+.765s+1)(s^2+1.848s+1) etc...

Hi everyone Does anyone know how to design a 3rd order low pass Butterworth active filter with a cutoff frequency of 8khz ? thanks p/s: Attachment below is what i have

hi everyone my question is what kind of circuit ( high pass, low pass, band pass, band reject,etc...) is this ? I think it is band pass , or either band reject but not really sure, which one do you think ? and why ? please explain your answer. Thanks alot. Have a good weekend guys

thanks, i got it

hi everyone i have a proplem with this excercise: f(t)= (t+1)/(t^2 + 8t + 16) Here what i started: (t+1)/(t^2 + 8t + 16) = (t+1)/(t+4)^2 (t+1)/(t+4)^2 = K1/(t+4) + K2/(t+4)^2 i am stuck from here, anyone please help me, thanks first

Herer what i did : Case 1 i(t)= (v0/R)*e^(t/R*C) i(0)= vo/R i(infinity)= 0 Case 2 v(t)=v0*e^(-t/RC) v(0+)= v(0) v(infinity)= 0 Case 3 i(t)= -C*(dv/dt)= -C* d(v0*e^(t/R*C))/dt i(0)= -C*d(v0)/dt i(infinity)= 0 Case 4 v(t)=v0*e^(-t/RC) v(0+)=...

hi everyone can someone helps me out this proplem? just tell me which to start, I'm totally don't undestand this proplem here is the link [PLAIN]www.viethost4u.com/EE.GIF[/URL] sorry about the picture too big (79kb) ,i can't upload up here

Here what i did: For mesh 2: (i2-i1)*R4 + (i2-is1)*R2 + (i2-i3)*R5 =0 which i1,i2,is1,R2,R4,R5 are given For mesh 3: R6*i3 +(i3-i2)*R5 + vs3 = 0 we have vs3 = 3ix but ix =-is1 -i2 ( KCL) Put them together and solve ==> i1,i2,i3 thanks for repond

i cant; attach,because this site say the image too large,i think it work now

hi everyone i try to solve this proplem but only have mesh 2 and 3, i stuck at mesh 1,please anyone give me some advise ? or ways to solve this proplem, thanks first. Given : Is1= .75A, Beta =1 A/A , rho = 3ohm R1= 2 , R2 =2 , R3= 2, R4 =2, R5 =1, R6 =3...

i think the current should be -1.2A for final answer right ?

i got dx= -181.6 dy= 72, you was right, i have change bx= -400 and cy -188 please check if i 'm wrong http://viethost4u.com/toan/answer.GIF