# Search Results

Results tagged with
Search options not deleted user 141599
62 results

A filter selectively processes input signals in frequency- or time-domain.

### Calculating the cut off frequency of a filter circuit if you know all the component values

This is an active Sallen-Key filter followed by a passive low-pass filter. … Let's start with the active filter. There are plenty of options to determine the transfer function of this active filter. …
• 16.6k
1 vote
Accepted

### Transfer function of filter

This is the problem with the classical analysis, you end up in algebraic paralysis and getting control back is difficult. The easiest and fastest way is to consider the FACTs. By considering the physi …
• 16.6k

### Deriving the transfer function of a notch filter from schemtic

I have looked at this filter and derived its transfer function using the fast analytical techniques or FACTs as described in the book I wrote on the subject. … As you have two capacitors in the circuit with independent state variables, this is a second-order filter. …
• 16.6k
Accepted

### Filter RC passive - Calculate fz y fp

This type of transfer function is determined in a snapshot using the FACTs described here. Look at the below drawing. First, determine the transfer function for $s=0$: open the cap and see what gain …
• 16.6k

### Analog filter -> cutoff frequency question

The simplest approach here are the fast analytical circuit techniques or FACTs. They are based on the Extra-Element Theorem (EET) forged my Dr. Middlebrook a while ago. I am going to show you how you …
• 16.6k
1 vote

### General transfer function for a bandpass filter

There is actually another low-entropy form presenting the transfer function in a more compact way in my opinion: $H(s)=H_0\frac{1}{1+Q \left(\frac{s}{\omega_0}+\frac{\omega_0}{s}\right)}$ $H_0$ re …
• 16.6k

### What is the formula for cutoff frequency for LCL filter?

The Mathcad sheet is below: I have then tried to rework the 3rd-oder polynomial form into a cascaded 1st-order filter followed by a second-order polynomial considering that one root dominates at high …
• 16.6k
1 vote

### Finding the cut-off frequency of a filter circuit at -3db from transfer function

In this filter, there is no zero and will concentrate on the poles only. … As you can see, the gain is 1 in this configuration (we considered an unloaded filter). …
• 16.6k
1 vote
Accepted

### Finding corner frequency of RC bandpass filter

The difference is that you now have a transfer function letting you calculate the values for all components depending on how you want to tune this filter and what attenuation you want at the peak. …
• 16.6k

### Finding corner frequency of RC bandpass filter

The second circuit you have proposed as a replacement differs from the original one though it also performs a high-pass function. If you follow the flow I described earlier, you should find the follow …
• 16.6k
1 vote
Accepted

### 2nd order RC lowpass filter cut-off frequency and Transfer Function

find the equivalent circuit when removing the differential configuration: Once you have a working equivalent schematic (same ac and dc responses), then you can start the analysis of this second-order filter
• 16.6k
Accepted

### Calculating transfer function for complicated circuit

This circuit is a 7th-order system and if you apply the impedance divider as recommended, then you'll end up in a total algebraic paralysis unless you want to use a computer for doing it. If you want …
• 16.6k
1 vote

### Transfer function using mesh analysis

This transfer function can be solved without writing a single line of algebra while going straight to the point with a low-entropy expression. I will be using the fast analytical circuits techniques o …
• 16.6k
Install a test generator $I_T$ across the input terminals of your filter. The $I_T$ current is the stimulus while the voltage $V_T$ across the source is the response. …