Use this tag for circuits that only contain passive components, such as resistors, capacitors, and inductors. This includes RC, RL, LC, and RLC circuits.

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44 views

Kirchhoff’s law works in an RLC circuit with DC [closed]

Can somebody please explain how Kirchhoff’s law works in an RLC circuit with DC
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1answer
40 views

Is Kirchoff's Voltage law valid to derive current for LC circuits?

In this source it employs KVL: http://physics.info/circuits-rlc/ BUT in this source at page 6 it says "Apply Faraday’s Law in order to find I(t). (Can’t use KVL since magnetic flux is changing)": ...
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51 views

Problems with simple RLC Series circuit

I've just started learning about RLC circuits, and using a few different resources has confused me greatly. Here is the circuit in question: There are three seperate scenarios, one in which the ...
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1answer
34 views

exponential term in RLC sinusoidal analysis

I was learning to work with RLC circuits with sinusoidal excitations and the book I was dealing with showed me that the responses of these passive elements to sinusoidal excitation were themselves ...
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1answer
37 views

Impedance measurements of Nano-Materials using Hioki 3532-50 LCR HiTESTER [closed]

I have been using Hioki 3532-50 LCR HiTESTER (manual) to measure the impedance, Parallel capacitance and phase angel of nano-materials at different temperatures from ambient to 1150 °C. Lately I have ...
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1answer
96 views

How can I replace this inductor with a transmission line?

I'm new in transmission line theory, hope you can help me. I have this circuit: And I have the admittance; Yin=(1-j) x10^-3 [S] and its frequency f=100 [MHz]. What I need its first to find the ...
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0answers
54 views

Circuit that behaves as a long transmission line. Any ideas? [duplicate]

I am in need of a circuit that would replicate the behavior of a very long coax cable (miles long). Namely, I am interested in how it would distort a relatively low-frequency signal and how it would ...
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1answer
63 views

What's the function the network outside a crystal oscillator connected to an IC?

Take a look at this: Then general network is commonly seen when connecting an oscillator to an IC. What is the purpose of this network? Is there an article I can read on it?
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1answer
119 views

Norton Equivalent of Capacitively Coupled LRC Circuit

The diagram below is a schematic representation of a microwave lumped element notch filter. The goal is to analyse the parallel LRC circuit and derive an expression for \$S_{21}(\omega)\$, where port ...
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1answer
64 views

Using kirchhoff's voltage law with current sources

This is a follow up question of this question. Summarized: The question is solved there good, however I wish to solve the problem the using Kirchhoff laws. Kirchhoff's voltage/mesh law is nice as it ...
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1answer
40 views

What do I need to learn for solving these [closed]

simulate this circuit – Schematic created using CircuitLab The network 'N' contains only 2 elements. If the response for unit step excitation is i(t)= e^(-3t) A for t>=0. Determine ...
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2answers
66 views

simple network analysis doesn't give correct result

Well I tried to calculate the circuit below, because of little experience the calculation became terribly messy and I didn't solve it. I need to calculate the power given by the 3A current source. ...
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2answers
70 views

Phasor Representation of Sinusoidal Forcing Functions

Lets take a phasor Vm<\$\theta\$ which is equivalent to Vmcos(\$\omega\$t + \$\theta\$) Let us Assume that a forcing function on a network is Vmcos(\$\omega\$t + \$\theta\$) +j Vmsin(\$\omega\$t ...
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1answer
82 views

Initial Conditions and current for an RLC circuit

It is required to find \$i_L\$ and \$v_c\$. It is quite easy to find \$v_c\$ from \$i_L\$ using simple integration. So, for now finding \$i_L\$ will be the concern of the question. Prior to closing ...
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1answer
97 views

Resonance factor of RLC circuit

Say we have a RLC circuit, connected to a source. Say, regarding to the positive side of the source, we have in order, an inductor L, followed by a resistance R and a capacitor C in parallel. So we ...
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1answer
109 views

Calculating maximum power of a unknown resistor

I need to calculate for what value of Rpot, will I get the biggest value of power. This is the electric scheme: The values are: 𝑅1=1kΩ, 𝑅2=250Ω, 𝑈=5V. I have idea how to do it, but I don't know ...
2
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1answer
210 views

Oscillator for High Voltage Transformer: RLC or Blocking Oscillator

What type of oscillator is being used in the schematic? How is that particular oscillator working in this circuit? I'm less than confident with oscillator theory, and I can't tell if this is RLC or ...
2
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2answers
104 views

What are state space equations?

I'm in a Linear Circuits semester II class, and we're going over 2 port networks. State space equations show up on the practice exams but not the lecture slides or book. I was wondering if they were ...
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3answers
205 views

Steady State RLC Circuit With Dependent Current source

I'm trying to figure out the reason why in the following circuit, at steady state, the current ix is zero. My best guess is that because there is a parallel branch which by KCL should equal 100ix and ...
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2answers
86 views

Calculating internal resistance of a voltage source? [closed]

I am trying to do some assignment for my homework. This is the assignment. The voltage at voltage source is calculated with measuring device that has has 2 resistance. The voltage measured is 10V. ...
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1answer
73 views

Trying to get v(t) for discharging RLC battery

I'm having trouble with the following problem. I want to find \$V(t)\$ (part (d)) and have been working for quite a long time on it. My first question is, if I do the following, are all the ...
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5answers
373 views

How to use input/output termination resistors in filters?

NOTICE: I have added another question here that a solution for each one may help for solving the other one. Please look at Fig-1 below. It is a common usage of termination resistors. R1 , R2 work ...
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1answer
102 views

Calculating voltage in RLC circuit

Well I think the prof has made a mistake in one of his exercises, though asking here to be sure, The question is to calculate the supply voltage in the system below. simulate this circuit ...
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1answer
96 views

Getting the total impedance (and voltage from it)

Well considering below schematic, how can the voltage over the capicator be calculated? I've tried first to solve it by mesh analysis (replacing the supplied voltage + resistor by thevenin's ...
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4answers
99 views

Shape current through coil

Suppose I have a simple RL-circuit with known resistance R and, inductance L with a voltage source where I can apply any input voltage (via an arbitrary waveform generator). What I want now is a ...
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2answers
87 views

LC-Circuits and Feedback into power supply

I am a medical researcher and I found an effect that I think I understand half way, but not completely and I hope someone more skilled in electrical engineering can clear this up for me. I am a novice ...
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1answer
216 views

What is the physical meaning of an LC circuit having a negative transfer function?

Say you have an ideal LC circuit: simulate this circuit – Schematic created using CircuitLab The transfer function of this circuit is a complex voltage divider: $$ \frac{\frac{1}{sC}}{sL ...
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0answers
64 views

Working of a Choke Filter?

I was reading up on LC filters, and from what I understand, the inductor limits sudden changes in current, and capacitor allows AC to pass through, thus getting a somewhat constant output voltage. How ...
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1answer
104 views

Is it the frequency that determines the current in a LC Tank Parallel Circuit?

Jump a head to the question if you aren't interested in the background of my project Background of my project I want to create objects of metal. So I need to be able to cast a metal. Aluminium seems ...
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3answers
452 views

Electric car “J1772” charger - “pilot” signal sequencing with passive circuitry

J1772 Some background: Many electric cars are designed to use a "J1772" charging point. The main signal in the J1772 specification is called the pilot. Long story short, the car is expected to ...
5
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3answers
342 views

Why would I use a transformer instead of one inductor in a crystal set?

I'm reading up on A Simple Radio Receiver. I have a question about this image: The signal from the antenna (perhaps a few tens of microvolts, or hundreds for a nearby transmitting station) ...
2
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1answer
287 views

LC filter sizing 50Hz AC to good DC (RMS to DC)

I'm using a LTC1966 for a RMS to DC converter. My capacitor is a 10 µF. When measuring with an oscilloscope, I have a small ripple which I want to remove. My result from ADC to the program shows a ...
2
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1answer
108 views

How do I momentarily ground a 3.3V signal (with a pull-up resistor) when power is first applied?

I need to momentarily ground a 3.3V signal that has a pull-up resistor on it when power is first applied. This is feasible using a microcontroller or a push-button, but is there a "passive" way to ...
5
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3answers
336 views

What does the impedance look like around a small resonant loop?

Say I have a hoop of conductor, broken at the top, with a capacitor across the gap. The inductance of the hoop and the capacitance form a series resonant LC circuit: Now, say this loop is excited ...
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0answers
125 views

Coupled LC Resonator in MATLAB

I am designing a dual-mode resonator with the following Circuit Model and Frequency Response! ADS Circuit Model: Frequency Response: I need help with the modelling of my circuit model in ...
5
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3answers
282 views

Recommendation for ADC noise filtering?

I'm using an ADC (adc081c021) with a pretty noisy input: There is also a 5-second video here: http://tinypic.com/player.php?v=2ue47cm&s=5 The objective is to detect the two peaks. How could I ...
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2answers
320 views

Designing parallel RLC band-stop filter in series with load from f0, gain, Q parameters

I've been trying to design a band-stop filter for my headphones to cut back on excessive highs and to provide a more flat frequency response. With a software EQ and lots of tries, I managed to arrive ...
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1answer
180 views

Setting up Norton Equivalent of RLC circuit automatically?

I'm trying to gain a better understanding of how the internal SPICE solve works, and for the most part I understand the basics of DC analysis and transient analysis when it comes to RLC networks. The ...
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2answers
397 views

Damping in an RLC circuit

In an RLC circuit,what criteria could be used to decide whether the system is overdamped or underdamped? Could we compare the maximum energy stored during one cycle to the energy dissipated during one ...
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2answers
468 views

Discharging RLC. Kirchhoff's second law

I have been trying to solve this homework problem for who-knows how many hours. I could break it down enough as to specify the problem I'm facing into a single question: For the following circuit ...
2
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1answer
465 views

How do I calculate parameters of LC filter from component values?

I have found this schematics and want to know corner frequency and characteristic impedance of this filter. How do I calculate it?
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1answer
5k views

How to calculate the resonance frequency of a parallel LC circuit with L having a DC resistance?

Here is the parallel LC circuit with inductor having also r: How can I calculate the resonance frequency?
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1answer
118 views

Building radios using RLC Meter

I'm interested in building AM and FM radios from discrete components. Has anyone ever used an RLC meter to precisely create the inductors and other elements used in these radios? I know cheaper RLC ...
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2answers
155 views

LC circuit poor man theory

Ok, let's suppose we want to explain the resonant frequency of an LC circuit. By kirchoff laws is not so difficult ending to the equation: By using the Wolfram alpha engine I end up with the ...
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1answer
171 views

Circuit RL simumation explanation

I was playing around with a circuit, and I am not understanding its behaviour, it appears to be wrong. I am using this circuit. If you close the switch, the current will flow through the inductor, ...
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2answers
410 views

poles and zeroes

In network theory, there is a theorem which states that all the network functions in S domain can be expressed as the ratio of two polynomials A(S)/B(S). The books define the poles to be the roots of ...
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3answers
2k views

Behavior of RLC circuit elements at t = 0

I'm wondering what are the behaviors of the inductor, L, and capacitor, C, at t = 0+ Please correct my understanding of the above circuit if I am wrong. At t = 0, the capacitor acts like a wire. ...
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1answer
160 views

First Order RL Circuit

In figure 8.21 $$ R_1 = 50 , R_2 = 200 , L = 2 H$$ Voltage is given by $$ V_{in}(t) = V_{s1}u(-t) + V_{s2}u(t) $$ where $$V_{S1} = -10 V , V_{S2} = 20 V$$ a) Find $$ I_L(0^+) $$ and $$ I_L(t)$$ ...
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1answer
766 views

how to calculate value of capacitor and inductor in an high power LC circuit?

I am a new learner of electronic. I am trying to modified a H-bridge motor driver circuit to control a thermoelectric cooler. Since I want to use PWM to control mosfets ON/OFF duration, in order to ...
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0answers
147 views

Y-parameters again

The Y-Parameter model uses the output current and the input voltage as the independent variables and expresses the other two in terms of these variables. But can anyone tell me why exactly do we need ...