3.333V
va=vc the diode passes currentIt is easy by inspection but doing it the old fashion way calculate the current in each parallel branch then calculate V drop in each R. Noting that V-A & V-C are = then no current flow
thru diode ??
That is wrong. The diode passes current when the anode is more positive than the cathode by 0.6-0.7 Volts. The drop is current dependent.va=vc the diode passes current
It's a perfect diode = no voltage drop at any current when forward biased.That is wrong. The diode passes current when the anode is more positive than the cathode by 0.6-0.7 Volts. The drop is current dependent.
@AlbertHall In order to conduct non-zero current it must be forward biased, but it ain't forward biased! If it was forward biased it could conduct ANY current but it WOULD STILL BE FORWARD BIASED. Are you lost in a dark place?VA & VC= 3.3V, so the diode ain't conducting.. .
You are merely repeating what I said but in different words.@AlbertHall In order to conduct non-zero current it must be forward biased, but it ain't forward biased! If it was forward biased it could conduct ANY current but it WOULD STILL BE FORWARD BIASED. Are you lost in a dark place?
Not true -- you said there is no voltage drop. When any current flows through an ideal diode there is the forward bias drop. The current may be limited by external components, but the diode itself does not impose any current limit.You are merely repeating what I said but in different words.
Hi,Not true -- you said there is no voltage drop. When any current flows through an ideal diode there is the forward bias drop. The current may be limited by external components, but the diode itself does not impose any current limit.
Hello,in case
a) Id == 0
then
Va == Vc
else
Va < Vc , because any Id > 0 will cause a further drop in Va and grow in Vc, which is incompatible with Id > 0.
Consequently Id must be 0 and Va == Vc == ER1/(R1+R2)
An ideal diode is compatible with any cero or greater than cero current. Vd == 0 is a singular point in its idealized I-V characteristic curve.
by Aaron Carman
by Duane Benson
by Aaron Carman