Circuit (Network) analysis is the process of finding the voltages across, and the currents through, every component in the network.

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How to calculate electric current in this electric circuit?

Ok here is the problem. I have this circuit ( picture below ) and I need to design buck converter for it. I was told by my mentor that I should calculate electric current this circuit will consume. ...
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0answers
23 views

Why is it impossible to realize elliptic even-order filters with \$R_S = R_L \$?

Referring to RLC continuous-time prototypes of filters, I have read that an elliptic filter of even order can not have equal source and load termination resistances. So, this circuit can be used for ...
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1answer
39 views

Reverse bias I-V characteristics of mosfet

What is the equation for a N-channel MOSFET's current value (\$I_{DS}\$) given a negative source-to-drain voltage \$V_{DS}\$? I can find plenty of forward biased I-V curves for the N-MOSFET, but I ...
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1answer
36 views

Capacitance value - AC RC Circuit - Impedance Method

Here is the circuit: simulate this circuit – Schematic created using CircuitLab \$ V_i = \frac{8}{\sqrt 2} \angle0° V\\ V_c = \frac{6}{\sqrt 2} \angle45° V\\ R = 1000\space\Omega \$ ...
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1answer
30 views

Forced Response Test Bank Question

I'm trying to calculate the forced response for a current in the above problem. I'm having trouble getting the right answer, and I was hoping someone could take a look and point me in the right ...
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1answer
27 views

Analyzing reflection and transmission without a VNA

The wikipedia page for network analyzers mentions "reflection and transmission of electrical networks are easy to measure at high frequencies" but doesn't give any hint on how this is done or what it ...
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2answers
73 views

Is it possible for the transfer function of an RLC system to have zeros other than at the origin?

I could not find a counterexample to the claim that the transfer function of an RLC system can only have zeros at the origin. Is this a true statement?
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1answer
37 views

Mesh Analysis on AC circuit

I'm doing a practice problem and I'm unsure how my approach did not receive the same result as the solution. Any help would be appreciated. Below is the Figure along with the solution as well as my ...
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1answer
47 views

s-Domain Analysis?

I've spent a really long time on this question but any approach I use gives me extremely messy solutions which make it impossible to convert the equations back into the time domain. This is what ...
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1answer
29 views

Thevenin equivalent of the input of an op amp?

In the image above, the subcircuit in the box in the top circuit is reduced to the subcircuit in the light box below it using Thevenin's Theorem. I don't really see how to get a Thevenin equivalent ...
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1answer
59 views

How to start solving this circuit

How would you even begin this question? You could resort to a massive amount of equations using nodal or mesh analysis, but is there any faster way to go about solving it?
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1answer
48 views

Autoreset circuit for arduino - how I think it works

HI I wanted to ask the resistor and capacitor combination within the black circle, it forms an rc constant right? Am I correct in assuming when the chip is powered up, the capacitor is charged up. ...
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1answer
101 views

Second-Order RLC Circuit

How do I find the second-order differential equation, in terms of \$i(t)\$? At time \$t>0\$, the voltage source will be gone, and I will have a parallel \$RLC\$. I am having problems with finding ...
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1answer
33 views

Analyzing a small-signal MOSFET circuit

This is the problem: And this my solution: Is it correct ?
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0answers
68 views

Analyzing a MOSFET amplifier circuit

This is the problem: And this is my solution: I want to check if it is correct or I've done some mistakes.
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1answer
98 views

Analyzing a MOSFET circuit

This is the problem: And this is my attempt to solve it: For (1): I don't know how to get vgs or how to use the hint to get rid of it. For (2): I assume that ...
2
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4answers
86 views

Why do transmission line equations use current through inductor rather than capacitor?

I could not fit the title in I actually wanted which was this: In the transmission line equations why is the current difference either side of the inductor used in the capacitative current drop ...
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0answers
37 views

How to describe circuit in state space? [duplicate]

I have this circuit and I must describe it in state space. I want to solve it with kirchhoff equations. I have found: First loop: V(t)=V(R1)+V(c1)+V(R2) Second loop: V(R3)+V(c2)=V(R2)+V(c1) third ...
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3answers
183 views

How do you calculate the current and voltage when the emitter is grounded for saturation mode

For example, assume you have this transistor with a grounded emitter: Since we are dealing with a saturation mode, \$v_{ce} = 0.2 \$ making the drop across the resistor 9.8 v. The current going ...
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2answers
61 views

Examples of one port network

Can anyone give me some examples of one port network, explaining its significance? Actually I just want to know whether or not such one port network exists? If they do,what are they used for.
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2answers
79 views

Paralel RC time constant [closed]

In parallel RC circuit, what is the behavior of current of capacitor C1? What is the time constant?
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2answers
32 views

Question about the current flow and voltages in a simple NAND diagram

I've so far learned about boolean algebra and its applications to transistors. This is a picture of a NAND diagram: A NAND has this boolean property : \$ f(A,B) = \overline{A \cap B}\$. What I want ...
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2answers
57 views

Solving a Thevenin equivalent circuit

Suppose \$R_{1}\$ and \$R_{2}\$ are replaced by resistors of unknown values which are different from those assumed in part (a). Using a variable external voltage source, a student applies \$+1.5V\$ ...
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2answers
78 views

Electric current of inductor

I have a homework problem that was solved by our instructor: "Calculate the electric current of the inductor at \$t=0^+\$." He calculated \$1/30\$ but the answer sheet was says \$-1/30\$. Which ...
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0answers
62 views

How can I create a circuit in another dimension from my circuit

I have a 9V battery and would like to use it as 5V. I tried a voltage regulator but, as far as I know, it takes too much power from the circuit. My idea, is to do the following: First I want to drop ...
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2answers
130 views

Finding the voltage and charge across capacitor

Can someone help me find the voltage and charge across each of the capacitors? This is not just a simple/ parallel circuit so I am having a problem in formulating the right equation on how to find the ...
4
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1answer
71 views

Basic Filter Design

Need help with basic filter design. Firstly there is a low-pass filter(pictured below). I am supposed to derive an expression for the amplitude of the output voltage as a function of \$R_1\$, ...
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1answer
73 views

Analyzing MOSFET circuit

Here is the problem: And here is my solution and I want to check if it is correct or not: ...
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0answers
68 views

darlington emitter follower

I assume it's known that voltage gain from two transiators in bjt darlington follower emitter are: \$ A_{V1} \approx \frac{1-h_{ie}}{A_{i_1}R_{i_2}} \ \ A_{V2}\approx 1-h_{ie} \$. Now in the text ...
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1answer
32 views

Mechanical- Electrical circuit equivalence

Is this the right electrical circuit equivalent to the mechanical? simulate this circuit – Schematic created using CircuitLab
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1answer
48 views

Transducing a changing capacitance

I have a capacitor C which changes with time. Now I want to measure the varying capacitance as a voltage function, so I need to design a circuit for that. My motivation around the problem is that, I ...
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1answer
38 views

Norton's Circuit of dependent source

I want to know whether the two circuit given are equivalent? Explicitly I want to know when can we use Norton's transform for dependent source? simulate this circuit – Schematic created ...
1
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1answer
49 views

voltage Gain in BJT

I am reading the book: Problems & Solution of Electronic Devices & Circuits, and on page 119 I got stumped. They write that : $$A_V = A_I \cdot \frac{Z_L}{Z_i}= \cdots = ...
2
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3answers
71 views

Norton's theorem application problem

The first image shows the circuit we start with. The second image shows the circuit in which I had the load removed (as I know from Thevenin's theorem). After that I'm getting confused because of the ...
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1answer
36 views

Output frequency of bistable multivibrators

I was wondering if there was a way to determine why the output frequency is half the value of the input frequency based on the schematic. I am currently learning about multivibrators in the Navy and ...
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4answers
446 views

Purpose of 2 resistors in high pass filter?

In the picture below, what is the purpose of R1? Compared to a high pass filter with 1 resistor, how does this affect Fc? Thank you.
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42 views

In the following circuit (in the image), find the current through Z2?

The underlined symbol means it's a complex number. Es are voltage sources. Js are current sources. Zs are impedances. I don't know how to deal with current sources while solving circuit So please ...
2
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1answer
260 views

How to cascade transformers?

I'm currently working on a project were I need to cascade several transformers (the core we use does not nearly work as good as it ought to..). I'm using the equivalent circuit shown in (A), ...
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44 views

How to analyze this diode circuit (zener regulated power supply)?

My solution: a- Full-cycle rectifier. b- V1(max) = vs(max) - VDo = A - Vdo = 15sqrt(2) - 0.7 = 20.5 v c- Vo = Vz = 15 v. d- Vr = Vp * T / 2RC = (15sqrt(2) - 0.7) * (1/60) / 2 * 100 * 1000 * ...
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0answers
48 views

half wave rectifier connected to a dc motor

we have half wave rectifier connected to a dc motor load. by using a step down transformer from 8 to 1. by modalization we have the Primary Winding resistance is Rp=50 ohm and it's Lp=0.1 H the ...
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5answers
105 views

Circuit Simplification

Calculate the current shown by the ammeter. simulate this circuit – Schematic created using CircuitLab How do we solve this using delta-wye transformations?
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1answer
67 views

What happens if we swap these two components?

So, in what looks like an attempt to explain mesh currents, my book has the following diagram: Then it proceeds to convince us of the veracity of several equations. The first of them makes sense: ...
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1answer
64 views

Analyzing a circuit with diodes connected in series

This is a problem with its solution: What I don't understand is how he replaced the three diodes with the voltage sources in DC-analysis or with the resistances in AC-analysis. What assumptions ...
2
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3answers
125 views

Non ideal op-amp equivalent circuit output voltage

I am creating this question to ask you about a "strange" behavior I am observing in Matlab about an op-amp circuit. I am reading "Fundamentals of Electric Circuits" the 5th edition, and in the chapter ...
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0answers
28 views

transient analysis in aim spice

How do I carry out the transient analysis of series RLC circuit using AIM Spice? I can't figure out what values should be given for step size and final time. Also, I was seeing some tutorials and ...
0
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1answer
73 views

How to solve this circuit using mesh analysis? [closed]

simulate this circuit – Schematic created using CircuitLab How would I solve ...
2
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1answer
48 views

How did my calculation become Erronous?

So I have this node voltage equation problem. Seems really easy, actually. simulate this circuit – Schematic created using CircuitLab In fact, this appears to be only one equation, ...
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2answers
115 views

Why don't over damped and critically damped circuits oscillate?

The reason underdamped LRC circuits oscillate is because the energy keeps flowing between the inductor and capacitor. The energy is being constantly exchanged between the capacitor and inductor ...
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1answer
38 views

Analyzing input/output characteristics of a diode circuit

In "Fundamentals of Microelectronics" textbook. The question number 27 of chapter 3 is: The part b of the question is: And the solution of b from the solution manual of this textbook is: Can ...