Recent content by kenok1216

Homework Statement Homework Equations p=nsf δ=mϒ Kd=[sin(δ/2)]/msin(γ/2) Kp=cosε/2 e.m.f=4.44TφfKdKp The Attempt at a Solution i do not know why pole pair =2 and it is short 2 pitch. how can i find pole pair and short pitch from its original developed diagram? i know that Phase spread=60(we...

Homework Statement part c Homework Equations The Attempt at a Solution Jm+2=m+2-1/m+2 Jm=m+1/m+2 Jm hence Jm+2<Jm should i expend Jm+2 Jm+1 Jm to the term J0 then compare them? why the inequality is <= but not <? should i use M.I to proof it??[/B]

thank for you teach! i will try to prove it!

Homework Statement to prove vo=(2R2/R1)[1+R2/Rv][vI2-vI1] and Rv is variable resistor Homework EquationsThe Attempt at a Solution upper: 2 is 0V? and then Rv,2R2 form a t-network? bottom:3 is 0V? if not how can i calculate?[/B]

thank for your,since my lecture notes just have the formula 1/[1+(jw/RC)],so i do not know that it have Dc gain K, but after search at google and read your comment, i got the point now, thank so much.

got it thank

from the graph (a) 0 to w0 ≅-10dB from the graph (b) phase differnet ≅-40 degree so the equation so Vi(t)=0.316Vi (sinθ-40o)then turn it to the H(jw) form?

sorry,still don't understand:frown: can you show me some step ?

NO,they are not the same ,for the equation of 1/[1+jw/612] 丨Vout/Vin丨=0.999998, but how can i make it become 0.316?

20log(Vout/Vin)=-10 丨Vout/Vin丨=10^(-0.5)=0.316? then what is the meaning of this number for the equation of 1/[1+jw/612] 丨Vout/Vin丨=0.999998 they are not the same,then how can i solve this problem?

but the equation of H(jw)=1/[1+jwRC] (from my lecture notes) 1/Rc=w0 (for w<0.1w0), hence i did not where 0.318 come from

to which equation?Vi=Va sin(wt+θ)? i find that 0.318 is 1/π where the π come from?

Determine the transfer function of the system H(jw) why the answer is not 1/[1+(jw/612)] but equal to 0.318/[1+(jw/612)]?

whu at w=100 the effect of c0 and c2 will not count also w=200 the effect of c1 and c0 will not count?

solved