Transformers In Passive Filters

[BKr0n]

So in a prior post (https://www.audiosciencereview.com/forum/index.php?threads/lattice-phase-equalizer.47694/) I wanted to use a lattice phase equalizer on every filter stage. I realize now that is dumb because of how many attenuator networks I would have to make. So I went back to the drawing board...

In the passive filter I'm working on, I wanted to account for phase as well as frequency. The only way to do that would be to analyze all 3 bands. How am I going to do that? Answer (maybe): reintegrate them.

Here's my question: could I use a transformer to reintegrate my low/band/high pass and turn said transformer into an all pass filter in order to analyze and, if need be, correct the phase relationship between the bands?

 

[AnalogSteph]

Are you really, really, really sure you don't want to do things like that using DSP / software?

 

[fpitas]

Did you lose a bet or something?

 

[fpitas]

could I use a transformer to reintegrate my low/band/high pass and turn said transformer into an all pass filter in order to analyze and, if need be, correct the phase relationship between the bands?

Maybe with years of work or something? What a very odd way to use a transformer.

 

[BKr0n]

Are you really, really, really sure you don't want to do things like that using DSP / software?

Please don't tempt me. I already had to talk myself out of making something with SigmaDSP lol

Maybe with years of work or something? What a very odd way to use a transformer.

Nope! Just really bored and like to try stuff!

Maybe with years of work or something? What a very odd way to use a transformer.

I have seen transformers used as outright inductors before in lots of different things before. Agreed on it being a weird way to use them, but nothing new. I also stumbled across something a little while ago talking about using an autotransformer as well.

Transformers for Audio

Driving audio signal transformers seems to be a straightforward process, but there are some interesting and quite fascinating issues that are poised to cause the user much grief.

sound-au.com

Placing autotransformer in crossover

Hey guys, actually I'm building a two way speaker and I wanted to attenuate the tweeter using an old school autotransformer. first of all I located it after tweeter HPF but when I measured all taps frequency response I felt something is wrong. Autotransformer should not change the frequency...

www.diyaudio.com

 

[fpitas]

Please don't tempt me. I already had to talk myself out of making something with SigmaDSP lol

Nope! Just really bored and like to try stuff!

I have seen transformers used as outright inductors before in lots of different things before. Agreed on it being a weird way to use them, but nothing new. I also stumbled across something a little while ago talking about using an autotransformer as well.

Transformers for Audio

Driving audio signal transformers seems to be a straightforward process, but there are some interesting and quite fascinating issues that are poised to cause the user much grief.

sound-au.com

Placing autotransformer in crossover

Hey guys, actually I'm building a two way speaker and I wanted to attenuate the tweeter using an old school autotransformer. first of all I located it after tweeter HPF but when I measured all taps frequency response I felt something is wrong. Autotransformer should not change the frequency...

www.diyaudio.com

Inductors, yes. It seems you need something like a phase delay network, which is quite another thing. Perhaps I'm not understanding.