Homework Statement
Unit cell of a crystal lattice is a parallelepiped spanned by the vectors u, v, w vectors have lengths of 1, 2 resp3 (le). angles between the vectors is
[u, v] = pi / 4
[u, w] = pi / 3
[v, w] = pi / 6
Determine the volume of the unit cell.
Homework Equations
How do...
but when the output voltage across a load is independent of the load they say in the book that out but acts as a ideal voltage source.
and that the output impedance =0 (can someone explain why it shoulde be 0) and if it is zero then is is same as the diagram 1
I am talking about op Amp.
Homework Statement
Homework Equations
Is 1 an ideal voltage source?
Is 2 and ideal current source?
i was solving a noninverting amplifier circuit and i was asked to find out output impedence.
and in the first circuit output voltage was independent of the load resistence => output...
http://www.eit.lth.se/fileadmin/eit/courses/etia01/hambleysolutions4th/Chapter_14.pdf
p 14 32
page 25
it says that Rin=0
but shouldn't it be infinity
because current going in to the op amp node =0.
it is not the same question.
And one more question in an amplifing circuit is the input impedance =0 or is is it infinity
or does it depend on the other facts.
We have a voltage source directy connected to + or - on the amp
but it woulden't be op-amp's inputs is = V1. for noninvering amp because R1 doen't exist in non...
what do u meen with use Use the voltage one?
i tried using kvl on all the loops but coudn't solve.
current goin in to the + on the amp =0 and voltage is 0 between + and - on the amp. summing point constraint.
Homework Statement
Analyze the ideal op-amp circuit shown in figure to find an expression for v0 in terms of vA,vB and the resistance values.
Homework Equations
if i label the voltage across R1 as V1
then vi know that v1=R1/(R1+R2) *v0
but i need one more expression for v1.
i tried...
So i shoudn't use superpostion in this case.
What do u meen by
if you leave the dependent source in the circuit you end up with two nodes to deal with, at the points with the V1 and V2 labels. Write KCL for both nodes. You'll end up with two equations in two unknowns. Solve for the one you...
2,5 in the first one and 10 in the second one
total 12,5 V
Thanks Gneill.
Now i have a another problem that i need som help with. My teacher told me that i can zero the dependent source in this problem and the result that i got was correct but according to book and websites you cant zero...
KCL Picture 1
Current source=zero
KCL at node Vx in the diagram.
-0,1Vx+0,25Vx+(Vx-10)/20=0
(Vx in this equation is Vx1 as gneill said)
Kcl picture 2
voltage source=zero
Kcl
-2-0,1Vx+0,25Vx+Vx/20=0
(Vx in this equation is Vx2)
I havent done any problem with dependent source using...
Homework Statement
http://img16.imageshack.us/img16/8901/circuit1s.png [Broken]
Homework Equations
I need som help with this circuitI need to use superposition to find out the value of Vx.
And to do that i need to zero the current source and voltage source
The Attempt at a...