# Tag Info

Accepted

### Stability of input filter in SMPS - Theoretical explanation

It is an extremely complicated subject. I have taught an APEC seminar in 2017 and tried to explain the interaction between a filter and a switching converter. First, you need to understand that a ...
• 14k
Accepted

### Fourier vs. Laplace

The Fourier and the Laplace transform are not the same. First of all, note that when we talk about the Laplace transform, we very often mean the unilateral Laplace transform, where the transformation ...
• 3,603
Accepted

### Meaning of Sigma in Laplace transform

As most folk know, $s=\sigma+j\omega$ (where $j\omega$ is the frequency along the x-axis in a bode plot or spectrum analysis). However, in a bode plot, $\sigma$ has no apparent meaning but it is ...
• 378k

### Under what conditions does jw equal the laplace variable s in an electrical circuit?

The Laplace variable $s$ relates to Fourier's $j\omega$ as follows: $$s = \sigma + j\omega$$ Fourier transform can be seen as a Laplace transform when $\sigma=0$. The $\sigma$ allows the ...
• 2,547
Accepted

### how the area is exactly zero?

The dirac-delta function has an area of 1 when integrated. The red area and the delta function have the same area. When integrated from t = (0-) to t -> inf the total area is 0.
• 1,786

• 7,959
Accepted

### How to find the system response given the transfer function without using Laplace transforms?

I assume you are permitted to perform partial fractions, even if you aren't supposed to use $\mathscr{L}^{-1}$. The roots of your denominator are $p_1=-6+j\:8$ and $p_2=-6-j\:8$ and the root of ...
• 68.8k
Accepted

• 2,341
Accepted

### Interpretation of Laplace transformed function and Laplace vs Fourier

The Laplace transform has some nice properties that help to get more insight into the behavior of linear systems. A very nice property is that the Laplace transform evaluated along the jw-axis is ...
• 7,955