All Questions
Tagged with linear circuit-analysis
23
questions
0
votes
3
answers
85
views
How to analyze and simplify a voltage divider with a second voltage source?
How do I simplify the circuit below?
simulate this circuit – Schematic created using CircuitLab
I know that R2 and R3 form a voltage divider, but I can't figure out the input impedance that In ...
- 1,135
1
vote
1
answer
144
views
Find R, L and C in RLC series circuit given voltage over capacitor and current through inductor
I have a couple of exercises in my textbook (Fundamentals of Electric Circuits 6th edition) that look like the following:
To solve this problem, my first idea was to transform it into the laplace ...
- 43
0
votes
5
answers
144
views
Superpostion problem, why are resistors shortcircuited?
We are asked to compute the voltage between points \$A\$ and \$B\$ in the following circuit directly i.e. without using Thevenin's or Norton's Theorem:
The teacher's solution is divided into three ...
- 205
0
votes
1
answer
67
views
Equivalence in circuits
I'm studying circuit theory, with only linear elements and no capacitors or inductors or mutual inductances, so no differential equations. All the sources (current and voltages) are constant.
To be ...
- 115
0
votes
0
answers
43
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Digimess dual linear PSU
Digimess (UK) seem to have gone to the wall, broken links on their website and phone line unobtainable. I wanted try and get the circuit diagram for my LM3002 Dual 30V 1A supply because the +ve side ...
0
votes
1
answer
213
views
Simplyfing a circuit by replacing two nodes with a voltage source and removing a connection between resistors
I am given the first circuit (A) and I have to find the voltage across R4. Since the potential at node C is independent (V2), I was thinking about a possible transformation to circuit B. However, I am ...
- 5
-2
votes
2
answers
180
views
Help With Thevenin Resistance Problem
Ok so I'm really new to electrical engineering and I was wondering if someone could help me analyze this circuit using KVL and KCL node analysis. I'm not really sure as to how I can set the KVL and ...
- 5
-1
votes
1
answer
306
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Can someone help me solve this?
A linear circuit is shown in the figure below
The VCCS (voltage controlled current source) is defined as 𝑖1=𝛽 ⋅𝑣𝐴 .
The other elements in this circuit have the following values: 𝑅1=3.3𝑘Ω , 𝑅...
- 5
0
votes
2
answers
61
views
Current flow and voltage difference
When there is a potential difference between two points in an electric circuit current flows . Then why does not current flow through an open circuit?
0
votes
2
answers
578
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Impedance of the circuit between given points
I am trying to learn one and two port networks and the book introduced Determinants and minors to calculate the impedance of the circuit. Kindly see the following question:
I have managed to do the ...
- 11
2
votes
2
answers
864
views
Why do two transfer functions of a circuit have same denominator?
I am investigating a linearised common-emitter circuit of the form:
simulate this circuit – Schematic created using CircuitLab
I am interested in the isolated transfer functions of each input ...
- 1,856
1
vote
2
answers
2k
views
kirchhoff laws with current source connected in series to resistor
I'm struggling with the following circuit trying, using kirchhoff laws, to write equations system that solve all variables.
simulate this circuit – Schematic created using CircuitLab
(Ground ...
- 139
0
votes
1
answer
457
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 ...
- 139
1
vote
4
answers
5k
views
Difference between load resistance and Thevenin/Norton resistance?
In the Norton/Thevenin theorem, what is the definite difference between the load resistance and Thevenin/Norton resistance?
I cannot find any sources defining the difference, all of the sources use ...
- 317
2
votes
2
answers
9k
views
Thevenin Equivalent of BJT Transistor
I wonder if I can replace a BJT transistor operating in active mode, with its Thevenin Equivalent, like this:
My guess is that I can, because the large signal model of the BJT operating in active ...
- 361