Questions tagged [superposition]

The superposition theorem states that the output of a linear circuit composed of multiple independent sources is the algebraic sum of the outputs due to each independent source alone. Use this tag for questions about circuit analysis using the superposition theorem.

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How do I get v0 using superposition in this circuit?

I'm trying to get the value of \$V_o\$ in this circuit. Here's the circuit: Using Superposition theorem: So first, we remove the voltage source and replace it with a short circuit. Then we calculate ...
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Superposition principle and op-amp

I was trying to answer these questions (picture below) but I am not sure if I did a good job. The way that I solved it is shown on this picture below: At the inverting part of the op-amp where the ...
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How to do i solve this electrical circuit? [closed]

I've been trying to solve this circuit with two current sources: Following is given: ia = 1mA, ib = 2mA R1 = 1K, R2 = 0.5K, R3 = 2.2K, R = 4.7K Personally I've been trying to use KCL to determine ...
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81 views

Substitution + Superposition with RLC circuits

Consider the following circuit: simulate this circuit – Schematic created using CircuitLab \$E\$ is a constant voltage source. The switch is closed at time \$t = 0\$. The request is to ...
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29 views

finding missing current and voltage in a circuit involving superposition

We are given a black box that contains only linear circuit elements and a pair of ports. We conduct the following two experiments with this black box. With the right port open, we applied V1 = 2V to ...
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69 views

Superposition principle and voltage division

I am looking at some circuit solving using the superposition principle and I came across this one. We need to find \$v_0\$. My thought would be to use superposition and voltage division in the ...
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38 views

Superposition principle with current divider

Can somebody explain to me how can I use a current divider in a linear circuit with two current sources? I understand that the given source is linear, so we need to apply the superposition principle. ...
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1answer
102 views

Is there a paradox in the superposition principle?

I came across this problem for the first time when I started thinking about the clever circuit of Howland current source (see What is the brilliant idea behind the Howland current source?). Let me ...
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Superposition analysis with VCCS

I have just started doing electrical engineering course in the university. And I really don't understand how to treat those dependent sources when doing the superposition analysis of the circuit. Here ...
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298 views

Kirchhoff’s Law and Superposition Theorem

For the given circuit I found the current and the voltage at R1, R2, R3, using the superposition theorem. 1.I replaced the VS2 with a short then calculated: I1= 0.57mA, I2=0.33mA, I3=0.2mA, V1= 2.68V, ...
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How to solve circuit using superposition, thevenin, norton… etc

I want to solve this question, but i am beginner at circuit... So i don't understand when I have to use superposition, thevenin, norton.... because those are so confused..... (i am so sad...) Maybe ...
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Total Dissipated Power

Please help look into to the below question where total dissipated power is to be calculated. In the solution given in the text they have added the under root of the power and then squared the result. ...
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Superposition theorem with phasors [duplicate]

Can someone explain the superposition theorem step by step when applied with phasors (AC circuits)? I think books and websites mostly include examples of how to solve something with superposition but ...
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Simple questions about current flow and superposition

So I was doing this exercise to prepare (not homework, school hasn't even started yet), and I think I got the math and the logic right, but there are a few things that I didn't understand, and since ...
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1answer
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How to solve this task that relates to method of superposition

The task looks quite simple it says: Find the current that ammeter shows. \$ R = X_c = 10 Ω \$ \$ X_L = 20 Ω\$ The picture of circuit: I tried to solve it using method of superposition: In ...
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answer verification for Superposition question

I am trying to solve the superposition question, but unsure of the answer. If possible, please help.
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139 views

Thevenin's Theorem: Why is there a \$R_{th}\$

Consider a linear mess present inside the box, simulate this circuit – Schematic created using CircuitLab If there's a voltage drop \$v\$ across the load, then why cant we simply replace the ...
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146 views

Why is the frequency of the response same as that of the forcing function in a linear circuit?

Why is the frequency of the response same as that of the forcing function in a linear circuit? What's the case when the circuit isn't linear?
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121 views

Superposition with dependent sources

If the value of a dependent source (say CCCS) depends on the value of an independent source (say a current source). When setting the current source to 0, would that make the CCCS an open circuit (i.e. ...
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144 views

Thevenin's theorem equivalent circuit

I had an homework to do for school. One of the questions of this homework was to find the equivalent of a circuit using Thevenin's theorem. Unfortunately, my teacher told me that I didn't get the ...
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301 views

Intuition on Thevenin's Theorem

In the following lecture by Prof. Anant Agarwal at 36:00, he intuitively proves Thevenin's Theorem using the following circuit simulate this circuit – Schematic created using CircuitLab If ...
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Why superposition theorem has not been executed here?

Here is the given circuit In this problem while finding V1 we didn’t took the voltage contribution at that point by Vo(Superposition theorem)Only current source Is has been used to find the voltage ...
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1answer
96 views

Under which specific (formal) conditions can I apply the superposition theorem?

Superposition theorem fails when you have two ideal (identical) voltage sources in parallel. Under which specific constraints can I apply it? I have read that, in DC Circuits, superposition requires ...
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149 views

Differential amplifier, superposition theorem, output derivation, what is a loop here?

So based on this article, when V1 is removed/grounded, in this picture. Is the loop number 1 drawn correctly? Or does R3 and R4 both belong to the same loop? I'm not sure how Vout2 was calculated. It'...
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68 views

How to find the current in this circuit?

Please help me find the current flow in A1,A2 and A3. its my First FEE class and I was able to solve this with voltage source but with current source Iam Having trouble. also V1 and V3 are the ...
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108 views

Decomposing a waveform in LTspice to view only the transient component

In electric-circuit theory due to superposition for an LTI system, the voltage can be thought such that it is sum of of a transient response plus a steady state response. For example below the ...
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107 views

How to solve a circuit network involving a resistor parallel to a voltage source using only nodal analysis?

I have been stuck on this for the past week and this week i just dont seem to find out what am i doing wrong. Please help me spot my mistake. Here you can find My circuit on multisim. Please provide ...
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331 views

How to find v through superposition theorem in the following ciruit

What is the voltage V of the attached circuit? Using super position theorem. When i active the 9V source & short 12 V source is the current follows in 20 ohms, 10 ohms. & 4 ohms? Or it only ...
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462 views

Voltage Difference in Superposition Theorem

I have to find voltage across R5 using superposition theorem but the problem is that I have a voltage difference of 4.16V, Solution:- Shorting battery VS1 R34 =8/3Ω =2.67Ω (Solved R3 & R4 in ...
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54 views

Source transformation violation

Using thevenins or norton theorem, we can easily find current through the resistor as 1 amps. But if we convert the current source to voltage source , current turns out to be zero amps . Why?
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Ultra simple circuit (2 Resistor, 1 Voltage, 1 Current): Kirchhoffs Laws don't give the solution; Superposition, but how?

I am doing a course on Coursera "Intro to electronics" as electronics always was my weak point. Now we discuss npn transistors and I have simplified circuit diagram (see below) where I am supposed ...
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1answer
82 views

Skin effect with superimposed frequencies

Does a high-frequency signal affect the skin depth of another low-frequency signal? E.g.: On a solid 6mm2 copper conductor, there are three currents running through it at the same time: 15 A DC 15 A ...
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2k views

Use of superposition principle for the inverting amplifier

My current understanding of the inverting amplifier goes as far as assuming the second golden rule: no current flows through the OpAmp. From here on, up to the end result of \$ H(\omega) = -\frac{R_2}...
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76 views

Finding a current through a short circuit (Thevenin)

I am working through a question that involves superposition. I have attached a picture of the question I am working through. I am having difficulty doing question e) and f). I was hoping you someone ...
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1answer
408 views

Two Op-Amp Instrumentation Amplifier - Gain derivation

I came across the following appnote(slyt647) which analyses the two op-amp instrumentation amplifier topology. The gain was found by finding individual gains for each op-amp and adding them in ...
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61 views

Question about voltage in the open circuit

I have this circuit here, and I'm trying to its Thevenin equivalent voltage and resistance, using superposition. When I "kill" the \$V_{0}\$ source, it becomes a wire and the voltage across the gap is ...
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192 views

Unable to verify Superposition Principle via Matlab

I am dealing with this problem where I want to verify the Superposition Principle via Matlab. I have a DC source of 100V, an AC source of 50V, 60Hz and three resistances, R1=10 ohms, R2=20 ohms and ...
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233 views

Solving all-pass using superposition

I was reading this document talking about the use of superposition with dependant sources. At example 14 they state the following : I don't understand how they pulled the equation for Vo by ...
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RF mixer theory and short circuits

Suppose I have the following RF mixer circuit- How does placing two AC voltages of differing magnitude and frequency directly in contact with one another not create a short circuit condition in a ...
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1answer
50 views

Find the value of U by the means of superposition

I want to do that by superposition rule. Firstly i need to short the E source and compute U0 in case of current divider formula? So i will get u1 which is voltage loss when the voltage source is ...
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1answer
120 views

Thevenin Equivalent of this mesh

simulate this circuit – Schematic created using CircuitLab I have to calculate the resistancy value Rx, when the equivalent thevenin voltage is applied and generates a current of 2 Amperes on ...
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1answer
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Application of superposition theorem

I find superposition to be a noob's approach towards the analysis of circuits containing multiple sources... An experienced person will probably not use it... How do we deal with various sources at a ...
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112 views

Calculate current of resistor with Norton's Theorem

I have a problem with the following circuit: simulate this circuit – Schematic created using CircuitLab I have to calculate the following data using Norton's theorem: \$R_n\$ \$A_n\$ \$I_{...
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1answer
108 views

Thevenin \$V_{th}\$ calculation problem

I'm back with my basic questions. I'm trying to answer some questions, using Thevenin, for this circuit: simulate this circuit – Schematic created using CircuitLab I must answer: \$R_{th}\$ \...
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1answer
278 views

Superposition problem with \$\Delta\$-Y conversion

I'm trying to use superposition to solve the following linear circuit: Step I step I considered each active component as: But results are always wrong. Same procedure on many other circuits give me ...
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92 views

Thevenin network without resistance?

I'm trying to find the Thevenin equivalent network for the circuit below. But whenever I solve the equations, I always end up with V(t)=2V_a - 3i_s and can't get any expression showing V(t)~i(t) ...
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1answer
539 views

Find current and VAB with Superposition Theorem

Struggling to solve the following circuit with superposition theorem... I know I need to examine the circuit with each battery in isolation but I am confused how to treat all the resistors as they ...
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2answers
1k views

Why are dependent sources not disabled with the superposition principle?

I've been wondering this recently. My intuition says that a voltage drop across a dependent source is no different than any other circuit element whose response depends on the inputs of one of the ...
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232 views

Superposition and average power dissipation

Unfortunately, I am having trouble getting started on the question above. How can one model the affect of a voltage source on a circuit without the knowledge of the resistor configuration inside the ...
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1answer
1k views

Calculating current and voltage using superposition

I'm trying to calculate Vo and Io from the following circuit: I was using node analysis but I don't really know how that worked. A friend of me told me that I could better us superposition. I ...