Questions tagged [nodal-analysis]
A circuit analysis method in which Kirchhoff's circuit laws are used to determine the voltage between all nodes (points where circuit elements connect) and the current through all elements. Always use in conjunction with the "circuit-analysis" tag.
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KVL in Node-Voltage method
I read a book "Electrical Engineering—Principles and Applications" and the chapter 2.4 that deals with Node-Voltage method says that for the circuit attached "Thus, we write a KVL ...
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How to solve for \$v_0\$ in this circuit using superposition, and node-current method?
I'm probably missing something trivial but I'm banging my head over this problem for a few hours already.
I think what throws me off is the dependent current source behavior when we are shorting E2, ...
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Is is possible to check for reciprocity by looking at the G matrix in the MNF form?
According to the reciprocity theorem, a linear circuit is reciprocal if the transfer impedance in one direction is equal to the transfer impedance in the opposite direction.
If a circuit is described ...
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Nodal analysis with matrices
We have the following circuit. Our goal is to determine the . The straightforward method taught to us is to first: turn the voltage source to a current source and second: set the nodes:
The Op-Amp is ...
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Issue with Op-Amp calculations
The resistor's are all 1 ohm except for the one that is 1/3 ohm. Capacitor's are 2F. The Op-Amp is assumed to be ideal in this case. We want to get a function for the angular velocity of U_out/U_in as ...
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How to solve a elementary Wheatstone bridge with nodal analysis?
Coming here with a quick question about the following circuit. I believe it is a variation of a wheatstone bridge but as you can see, the power source is in line.
I am looking for the voltage at node ...
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Why do we typically think about circuits with nodes rather than meshes?
I was trying to wrap my head around the fact that voltages have a ground reference but currents are absolute, and yet, despite this fundamental difference, they are somehow mathematical duals of each ...
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The reference node [closed]
I want to calculate currents of resistors by choosing the referance node A and B. Could you help me to solve this problem?
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How do you solve for v_o in this clipper circuit?
Here is the circuit:
I tried to solve it, but I am just not sure if my solution is correct.
First I assumed that d2 is off for the positive half part of the cycle, then the circuit is simplified to ...
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Consider the circuit shown in (Figure 1). Suppose that R = 20 ohms. Find the thevenin equivalent [closed]
Consider the circuit shown in (Figure 1). Suppose that R
= 20 Ω Find the Thevenin equivalent.
I got an answer of 4.6 Ω and 18 V for Rth and Vth but the correct answer is 5 Ω and 12 V.
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Nodal Analysis on Supermesh Questions
I am a fresher in electrical engineering, So I was solving circuit analysis question with a current source between two meshes. I am not proficient yet in selecting which analysis to do in which case. ...
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SuperNode when there is a reference node?
i just realize i solve this circuit:
The problem asks to find Va, Vb and Vc, so i used the concept of 'SuperNode' in the V1 branch and i it got solved right (Vb=-12V, Va=14V and Vc=4V) , but ...
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Feasibility of methods for nodal analysis of a complex RC circuit network
<Circuit 1>
simulate this circuit – Schematic created using CircuitLab
I need to perform nodal analysis on the <Circuit 1> and much larger lattice RC circuits. The resistance and ...
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Nodal analysis with inverse Laplace transform of a simple RC circuit with an AC voltage source gone wrong?
simulate this circuit – Schematic created using CircuitLab
This is a simple RC circuit with an AC voltage source, \$E = V_0 \cos(\omega t)\$. In the sinusoidal state, \$Y_{\text{resistor}} = G\$ ...
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Node voltages with dependent current source
This is the way I set up this problem:
v1-v2/5 + v1/5 = 2I0/20
Io/10 + (v2-30)/10 = v1-v2/5
Setting it up that way gives me a v1 of 28.8 and v2 of 7.8, which isn't correct. I'm supposed to be getting -...
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Nodal analysis using matrices - Wrong math?
I am attempting to solve a (not so difficult) circuit using nodal analysis
However I am getting 0V for half of my nodes, which is clearly wrong, the results violate KCL
Method
I am using nodal ...
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3x3 nodal analysis. I know v2 but I don't know how I can use v2 to find v1 and v3
I tried KCL but I don't know what to do from there. I hope someone can show me how to do it.
This is how I figured out v2 is 12 V.
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Finding Thevenin voltage and resistance [closed]
I am struggling to find the Thevenin voltage and resistance across terminals A and B of the given circuit.
I got as far as writing KCL at nodes 2 and 3, which gave this:
$$v_\text{AB} = - G_2/G_1 e + ...
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How to model MOSFET in a continuous manner in circuit simulator with Early effect?
I'm implementing a power electronics circuit simulator. Currently I have all linear components including capacitors/inductors/transformers, switches, and as the only nonlinear component Shockley diode....
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How to solve for \$i\$ using superposition?
Second semester college student. But I'm actually confused on how I'm supposed to do this.
I know that I need to find \$i\$ values on each voltage and current.
a. 12 V on, 3 mA and 9 mA off. (\$i1\$)...
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How to solve this question by nodal analysis?
I have this circuit where I have to find the Thevenin equivalent. How do I solve this problem by nodal analysis?
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Finding transfer function of high-pass circuit
I've already done the calculations myself, but I am getting a completely wrong answer for the poles and zeros. I'm not sure what I am doing wrong. If someone could point out my mistake please I would ...
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Circuit Analysis Q's
When looking for the node voltages of the following circuit below I was wondering why we are not able to get the correct answer for node voltage V1 by solving the following way.
I1 = V2/30 = 100/30 = ...
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Norton equivalent circuit
I tried to solve the problem below but I don’t know if it’s right.
Im finding I2 or the current when SW1 is open. I put a test voltage 1V between the nodes of 8 ohm and 6 ohm resistors so its in ...
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Incorrect current assumed in Hayt Ex 5.3
Here is Example 5.3 from Hayt "Engineering Circuit Analysis" p 129.
I am supposed to solve it using superposition principle. While doing it I incorrectly assumed direction of \$i_x\$. I ...
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Why does this op-amp circuit show current flowing like that?
This image shows an op-amp being powered. Is there any reason why it shows current flowing from the negative side of the bottom battery into the op-amp or why it shows current flowing from the ...
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How can there be no Thévenin voltage with only a dependent voltage source? [closed]
I don't understand why the Thévenin equivalent is equal to zero in this case because, if the load is a resistance, then yes, the circuit would be dead as there would be no voltage drop across Vx. But ...
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Exponential stability of a general \$RLC\$ circuit with sinusoidal input
I conjecture that any \$RLC\$ circuit with \$n \ge 0\$ independent sinusoidal voltage sources of the same frequency is exponentially stable.
How to prove this or if this is not true, how to modify the ...
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How to derive an ODE for a general n-th order LTI circuit?
I have seen in multiple books the following fact:
Suppose we have an n-th order \$RLC\$ LTI circuit with and independent volatage source \$x(t)\$. Then a voltage \$y(t)\$ of some node in the circuit ...
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Nodal analysis doubt
Can we apply nodal analysis to find out the current in each branch for this circuit:
I am having trouble to find the correct reference point where I can take V = 0.
(If you are down voting the ...
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Including resistance between supernodes
Here,as per the circuit,we can take \$V_1\$ and \$V_3\$ with the voltage source across them as a supernode(as the area marked in red). In the red marked portion i.e supernode,we see that current can ...
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Equivalent resistance of network of resistors arranged in a cube shape
To determine the equivalent resistance across \$AB\$,I noticed that the three resistors in the lower face of the cube are in parallel combination. So I replaced all three with a single resistor \$\...
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Replacing resistances with equivalent resistance
In the above original circuit,by node analysis,we see that \$R_3\$ and \$R_4\$ are in parallel combination. So we can replace the two with an equivalent resistance \$R_e\$. For that we need to remove ...
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Analyze an RC circuit using either nodal or mesh analysis
How can I analyze the circuit shown in the diagram below using either nodal analysis or mesh analysis? I attempted solving the problem using mesh but ended up with the wrong answer.
To obtain the ...
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How do I apply nodal analysis to this circuit?
Looking at the diagram below, I see the formation of a supernode that is different from the ones I've encountered before and I really don't know how to go about it.
How can nodal analysis be used to ...
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How do I apply mesh analysis to this circuit?
I have applied the mesh analysis to this circuit using both clockwise and counterclockwise directions but I ended with different results.
Please let me know if there's anything I'm doing wrong.
Also, ...
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Special case nodal analysis
I tried to calculate, but I'm quite confused to go further. The calculations can be seen in the image itself.
This is a special case, nodal analysis with special dependent voltage source branch.
How ...
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Special case of nodal analysis
In this diagram, we see node V2, I can understand how it can be treated as a node. But I don't understand in the equation how \$-v2(0)\$ comes.
I thought maybe the R for short circuit is 0, then also ...
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Determining Thévenin voltage using nodal analysis
Here I want to determine \$V_{th}\$ without using mesh analysis and just by using nodal analysis. Now, \$V_{th}\$ is the same as the voltage across the \$6\ \Omega\$ resistor since no current passes ...
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Use nodal analysis to find Vo in the circuit of Fig. 3.72
I have been doing this sum with nodal analysis. As nodal analysis says when a voltage source is between to make a super node. But I cannot do KVL for the super node. Please help me with this question.
...
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In the circuit of Fig. 3.49, current i1 is: (a) 4 A (b) 3 A (c) 2 A (d) 1 A
I am starting this subject i need help for this question. If anyone could solve it please tell me.
I don't understand what to do with the nodal analysis. I am thinking to add the 2ohm and 3 ohm ...
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How can I solve this dual operational amplifier circuit with nodal analysis?
I'm somewhat unsure how to solve the Uout voltage of the above circuit using nodal analysis. Uout being the voltage at the right side obviously. I'm not entirely sure if what I have done so far is ...
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Calculations of mesh and nodal analysis of my dc circuit doesnt satisfy any of the KVL or KCL conditions
So I'm working on a course project under my professor and I seem to have encountered a huge problem.
I built my own circuit and solved it using mesh and nodal analysis in MATLAB, got some values but ...
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Which is the correct flow of current in these following circuits for nodal analysis?
My professor told me one method, a well known and trusted youtuber told another method and our assignment solutions have another method for nodal analysis so I can't figure out which method is ...
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Determining nodal voltages of a circuit with two supernodes
I am trying to determine the nodal voltages (namely, \$v_{1},\ v_{2},\ v_{3},\ \text{and}\ v_{4}\$).
I have determined that there are two supernodes: one between nodes \$v_1\$ and the reference node ...
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Resistive network with two voltage sources
Update: (I updated the description/Question for clarity)
I am currently stuck trying to solve a seemingly simple resistive network. The voltages U1 and U2, aswell as Rr are known. The unknown ...
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Node equations for Thevenin voltage
I have the following circuit as shown in the picture below:
I am interested only on finding the \$V_{th}\$ and not the Norton current.
I choose to work with node analysis because I find it easier. In ...
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How do you use nodal analysis to this circuit?
By using mesh analysis I have 4 equations:
6ia - 2ib = 24
-2ia + 12ib -20ic - 2id = 0
-8ib + 12ic = 0
-2ib + 12ic + 3id = 0
Got ic = 8/3 A, so Vo = 4(8/3) = 32/3 V ; correct me if I'm wrong
But I don'...
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Circuit analysis: how to find the voltage at node 2?
Find the voltage at node 1, 2 and 3 using mesh analysis.
Using mesh analysis I have 3 equations:
$$
6ia+10ib-4ic = 0
$$
$$
-2ia-2ib+4ic = 10
$$
$$
ia-ib=-5
$$
With this equation I find the current ...
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Simplifying a circuit for nodal analysis [closed]
I am trying to simplify/classify the following circuit:
My textbook says it is a four-node circuit but I am coming up with 3 nodes. Doesn't the "Ref." dot and the rightmost dot combine into ...
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