Recent content by xw0927

oic~~~~quite confusing about that because i haven't learn the characteristics of opamp.anyway.thx ya~

hey,dude,i m confusing about the precision rectifier...why the Vout =E,my question is why the Vout=E - V(diode) ?why the Vdiode does not take into account when finding Vout?here the attachement of the precision circuit diagram..

i also confused about it when i m studying the semiconductor now...i had doubt like the statement/question post by GAGS

ooo..okay,thanks ya^^...then about finding the location of the fermi level with respect to Ec,after we had determine it is N type semiconnductor,then we use the equation of Ef-Ei=kt ln N(donor) / N(intrinsic)?

for the semiconductor which doping both donor and acceptor impurities... for example,determine the hole and electron density thermal equlibrium densities and the location of fermi level with respect to Ec,for a silicon at 300K that is doped with 3x10^6 boron and 2.9x 10^6 phospohorus...the...

but the answer given to the equation is C1x^1.4 + C2X^1.6,its no complex solutions...and i just learn the euler cauchy equation only..

how to find the general solution for the equation (10x^2D^2-20xD+22.4I)y=0...no idea to find it by using euler-method...help..sos