Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options answers only not deleted user 38098

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

1 vote

How to construct a differential equation from this RLC circuit?

Just so you have my approach to consider, as well. (I know you've already selected an answer.) Here's the redrawn schematic which I prefer: simulate this circuit – Schematic created using Circu …
jonk's user avatar
  • 78.7k
1 vote

Kirchoff's Law Problem

You have four relatively obvious current loops that could use KVL. That's all you need for mesh analysis. (You don't need to include any KCL statements for the nodes.) simulate this circuit – S …
jonk's user avatar
  • 78.7k
1 vote

How do you derive an expression for the output voltage of a ladder network of N sections?

simulate this circuit – Schematic created using CircuitLab It's the case that \$R_i=\frac{2R\left(R+R_{i-1}\right)}{3R+R_{i-1}}\$, where \$R_{i-1}\$ is the prior source impedance leading up to sect …
jonk's user avatar
  • 78.7k
0 votes

Dividing in Polar form

The Photon probably gave you a way too terse answer. But it's correct, just the same. I'll provide a way too long answer. (tl;dr) Simplistic Geometric Approach It's best to think of a magnitude (the l …
jonk's user avatar
  • 78.7k
11 votes

Why is a linear passive circuit stable, i.e. why does its impulse response approach zero ove...

I suspect the problem may arrive from the requirement of an impossible domain for passive component values. Your characteristic equation breaks down (as I'm sure you already know) into: \$\left(s+1\ri …
jonk's user avatar
  • 78.7k
0 votes

RL circuit unit impulse response

It's not complicated. You have two unknown voltage nodes: simulate this circuit – Schematic created using CircuitLab Note that I've made the two legs independent of each other, because they ar …
jonk's user avatar
  • 78.7k
2 votes

Solving an RL Circuit with an Inductor in Parallel to Resistor-Inductor in Series

I had mentioned that I'd probably take a different approach than user600016's approach, using KCL instead of KVL. Both work for me, but I'm usually more comfortable with KCL as I tend to make fewer er …
jonk's user avatar
  • 78.7k
0 votes

Flyback Circuits

Yes, diodes are used in circuits to discharge energy stored on capacitors. It's an entirely different circumstance, though. Inductors will reverse their voltage when discharging energy and if all the …
jonk's user avatar
  • 78.7k
1 vote

Nodal analysis on AC RCL Circuit (I'm confused)

Assuming \$f=60\:\textrm{Hz}\$ and using the included schematic editor: simulate this circuit – Schematic created using CircuitLab From this, I get: $$\begin{align*} V_B &= V_C + V_2\\\\ \fra …
jonk's user avatar
  • 78.7k
8 votes
Accepted

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

Just to be complete: simulate this circuit – Schematic created using CircuitLab I gather that's the circuit. And you'd like an expression for \$V_{\left(t\right)}\$ and \$I_{L\left(t\right)}\$ …
jonk's user avatar
  • 78.7k
0 votes

Electrons inside an LC Circuit

My main question is how the overcharge from the one plate can create an overcharge on the other. I think I understand your question. The initial conditions are with the capacitor fully charged …
jonk's user avatar
  • 78.7k
2 votes
Accepted

Query on writing KVL equation for an RL circuit

I'd use KCL (not KVL) with the bottom node "grounded" and the top node as \$V\$: $$\frac{V}{R}+\frac1{L}\int V\:\text{d}t=0\:\text{A}$$ Taking the derivative with respect to time: $$\begin{align*}\ …
jonk's user avatar
  • 78.7k
0 votes
Accepted

Calculating Differential equation RLC Circuit

Since everyone seems to have been variously confused at different times about your question, let me re-draw and re-phrase it: simulate this circuit – Schematic created using CircuitLab (The ab …
jonk's user avatar
  • 78.7k
4 votes

Synthesizing an impedance given by transfer function (poles/zeros) using a passive network

With Verbal Kint's contribution, I'll expand on thoughts behind my earlier comment(s). Notes from: "A Practical Method of Designing RC Active Filters" I want to start out by reflecting on the TR-50 pa …
jonk's user avatar
  • 78.7k
1 vote

How is it possible that an LC Oscillator create a sine wave?

You know the current in the capacitor must be the same as the current in the inductor. Ground the bottom node, for a simple reference point. Then the current into the capacitor from the top mode (whos …
jonk's user avatar
  • 78.7k

15 30 50 per page