376 passive-networks questions.

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

4 answers, 4.700 views automotive passive-networks
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 ...

Calculate phase angle of LC||R circuit

1 answers, 154 views ac passive-networks
For this given circuit bellow, how do I calculate the phase angle? For my example I have values, but I would like the general approach formula, this is what I have done so far Calculated X_L = 2*...

Trying to understand the magic the author of this PDF did explaining the critically damped equation

I am reading this doc about the equations for the step function for the RLC circuit, critically damped solution. At page 16 we have these lines... But there is a magic between these lines... How ...

1 What value of C should be added in parallel to make the circuit appear purely resistive?

I'm currently working through Cogdell's Foundations of Electrical Circuits and came across problem 4.39 d) as shown below: Earlier in the question I found the frequency-to-be-used as 43.3x10^3 rad/s. ...

1 Trying to understand why the signal was inverted on this RC step response equation

I am watching this video where the guy is deriving the equations for the step function of a series RC circuit. At some point he has the following equation: \$\frac{dt}{RC} = \frac{dv}{v_s - v} \$...

Generating Resonant frequency

I have seen some articles about generating resonant waves using RLC circuits. I am wondering if that could be done using a crystal oscillator such as those used for microcontrollers?

RL-C Circuit Problem

I am trying to get some practice on the basics, but i am having some issues with the following question: Find Currents I(1) and I(2) and show them on a phasor diagram. Find the total current, I(total)...

Trying to understand the transient current equation on a RLC circuit

I am reading this doc I see this magic happening on the third line of equations... How in the name of Math, does this \$Ae^{st} \$ appeared there? Magic?

What is the impedance in a theoretical LC circuit?

2 answers, 77 views impedance passive-networks circuits
While writing a paper about an experiment I am conducting, I was wondering how inductor-capacitor circuits theoretically behaved. In theory, we assume that wires and components that are not resistors ...

Unsuccessful when testing a power entry module model in simulation

I'm trying to understand how this power entry module suppresses common mode interference. Here is the diagram: I want to sort of make a simplistic EMC test in simulation just to see how the common ...

Trying to understand the critically damped equations of a RLC circuit

I am trying to understand the equations of the critically damped equations of a RLC circuit here I see this part on page 16 The part I do not understand is this one: How can part of the equation be ...

How to choose current sense resistor and current sense Amplifier for precision sensing

While measuring current from 0A to 500mA with 10uA step, I am using current resistor, current sense amplifier, 16-bit ADC.How do I choose current sense amplifier and current sense resistor

1 Question on inductors with initial current

Question: Initially the switch position is aa', 3 H is connected across a 3 A supply and 6 H is connected across 6 A supply. After some time the make before break switch is actuated to the new ...

Analysing an RLC circuit. Help. Is the given answer wrong?

I have got an answer of 0.844 <108 A through nodal analysis with V1 being 18.91<18 V. I have been searching for an answer for 3 days but I can't find any help. And when made into a thevins ...

How to determine maximum power transfer and load impedance?

Edit: I realized my solution is invalid due to the dependent source. Upon further reading, I learned that only the independent sources get disabled, and \$R_L\$ transforms into a short circuit. ...

Transmittance of a capacitively coupled shunt resonator

I have been trying to understand the expression of |s21| for the resonator mentioned in this article. For a circuit similar to the drawn below, in which R1 is used as the temperature sensitive element,...

1 Close Oscillators Problem

1 answers, 83 views oscillator passive-networks tank
I have 3 "Emitter-Coupled" Oscillator, the difference is that I don't use a resistor on the tank circuit and I do vary the Inductor inductance. They're close on the PCB and they got some disturbs, if ...

First sorry if the question is stupid... I am learning. I am trying to visualize here, without equations, what happens to a RLC circuit that makes it oscillate. Consider a RLC circuit, a switch and ...

Simulating all transient solutions for RLC series circuits

I am reading this page that contains the transient solutions for RLC series circuits: over-damped, critically damped and under-dumped. This site presents these graphics for the 3 cases: Then I have ...

Some questions about a magnetically coupled circuit

Below the RLC circuit on the left side by the help of a periodic impulse generator V1 generates periodic damped oscillations with a certain frequency, and the resulting oscillating current couples to ...

Capacitively coupled shunt resonator

2 answers, 63 views filter passive-networks passive-filter
The diagram below shows a capacitively coupled parallel RLC resonator. Through simulations I observe that C2 and C3 influence the resonant frequency . I'd like to obtain the analytic expression for ...

LC filter stepper motor

can i use lc filter on three phase stepper motor (variable reluctance motor) to get sinewave current ? We know that if we put sinewave voltage on ststor windings, the stator current will not be ...

2 How is this circuit providing solution of the differential equation d^2 v/dt^2 = -9v?

Book pages at https://books.google.co.in/books?id=d-7owi6uNtMC What I see is that they have taken d^2 v/dt^2 as an input at point A, integrated it to get dv/dt, integrated it again to get v=2sin3t V,...

Volt/Amp dependent RLC band pass -> Loudspeaker expander using lightbulbs

I want to create a input energy dependent frequency shunt network, which goes in parallel with a loudspeaker, At low volumes, a certain midrange frequency should be shunted off the loudspeaker. The ...

Why do we use Laplace transforms to analyse transient circuits?

I just learned transient circuits and we solved them both in the time domain and the Laplace domain and I can't understand why we would use the Laplace domain as it seems it is a lot more simple to ...

Parallel RLC tank transfer function

1 answers, 43 views passive-networks transfer
I have seen the expression for the transfer function of an RLC tank given as the following. $$H(j\omega) = \frac{H_o}{1+j2Q\frac{\omega-\omega_o}{\omega_o}}$$ I am somewhat able to get this result, ...

1 LC circuit with switches

I am confused with the above problem. I tried but I am not sure that my answer is correct. Please verify my solution for any conceptual mistake.

What is the use of a RLC circuit placed before a full bridge rectifier?

While analysing a PCB, I realised that a RLC circuit was placed before the full bridge rectifier. I am wondering, what functional use does it have? simulate this circuit – Schematic created ...

Voltage across capacitor/inductor in RLC circuit

2 answers, 765 views ac passive-networks resonance reactance
It is said that voltage across capacitor/inductor is higher than the applied AC voltage. How?

6 Why is a linear passive circuit stable, i.e. why does its impulse response approach zero over time?

4 answers, 818 views circuit-analysis passive-networks
This is a silly question to ask because the answer might be obvious, but I still have my doubts. If given a circuit composed only of resistors, inductors, and capacitors, if its impulse response ...

In series RLC circuit, does increasing capacitance value really make the circuit more inductive circuit?

This seems very counter intuitive to me. How can increasing capacitance value make the circuit more inductive ? The math tells me so : If \$C\$ increases then \$X_c = \dfrac{1}{\omega C}\$ decreases,...

1 Very basic question about under damped oscillation frequency

Imagine a step response of a series RLC circuit oscillates as an under-damped way: I also came across the following equation: As far as I understand the Ï‰d above is the frequency of the damping ...

How to pass a square wave through transfer function in MATLAB?

1 answers, 175 views passive-networks matlab band-pass
I am currently trying to create a band stop filter which attenuates frequencies between 2000Hz and 8000Hz. I have got the transfer function but now I am struggling to find the documentation on how to ...

-1 Network theorem Source Transformation

2 answers, 59 views circuit-analysis passive-networks
When i am using Superposition Theorem i am getting 80W but when i using Source transformation getting 0W.Why getting different answers? Is there anything Hidden in source transformation that I need ...

4 Source-free, under-damped, parallel RLC with 2 intial conditions

3 answers, 177 views voltage current passive-networks

LC circuit with 2 capacitors, one charged, one uncharged

1 answers, 38 views capacitor inductor passive-networks
I have started to learn about LC circuits, in particular in the case where the initial conditions are where the capacitor has previously been charged. I am struggling to understand what would happen ...

1 How to determine whether a system is in resonance with an externally applied voltage - RLC Circuit

1 answers, 68 views current passive-networks resonance
Forgive me if this is the wrong forum. This is a problem in my Differential Equations class involving RLC circuits, but we have not gone over the concepts of these circuits in class. I'm given the ...

LC band pass filter

0 answers, 142 views filter passive-networks band-pass
I'm looking at implementing an LC bandpass filter, where I want upper and lower cut off frequencies to be 1254 Hz and 48 Hz respectively. Based on the pictures I've added - from http://www.radio-...