on page 8/15 to 10/15 under
https://pdf.dzsc.com/88889/4193.pdf
(save in the attachment) there is to find the circuit description to such an active crossover network.
Colloquially, this term is obviously totally outdated, since I can't find any further publications on the web in this case.
The special feature of this active crossover network is the absence of additional gain stages consist mostly of operational amplifiers.
Who can me send the currently usual term for this topology (maybe to find in the application notes from TI, NS, LT or Analog devices) ?
Thank you very much
https://pdf.dzsc.com/88889/4193.pdf
(save in the attachment) there is to find the circuit description to such an active crossover network.
Colloquially, this term is obviously totally outdated, since I can't find any further publications on the web in this case.
The special feature of this active crossover network is the absence of additional gain stages consist mostly of operational amplifiers.
Who can me send the currently usual term for this topology (maybe to find in the application notes from TI, NS, LT or Analog devices) ?
Thank you very much
The filters are in a feedback loop, isn't that the way to describe an active filter?
So it isn't correct to call a DSP active.
So it isn't correct to call a DSP active.
I think you misunderstand me - I don't talk about digital signal processor like that
https://cds.cern.ch/record/1100536/files/p167.pdf
https://cds.cern.ch/record/1100536/files/p167.pdf
I guess a sallen key filter with gain in a power amp.
Although they show it as an example, it's pretty difficult to get those stable even when the minimum gain requirement is being met.
Although they show it as an example, it's pretty difficult to get those stable even when the minimum gain requirement is being met.
op amp stages in usual sallen key active crossover networks are mostly unity gain stable. Modify most power amp topologies in unity gain mode result in oscillating. The lower the gain determined by NFB network (at a given open-loop gain) the higher the degeneration into an oscillator.
But why should be unity gain in the power amp necessary for implementing an active crossover network ?
In the datasheet ( link ) of #1 this condition isn't present, also not here:
https://ampslab.com/blog/2022/04/08/biamppro-bench-test/
But why should be unity gain in the power amp necessary for implementing an active crossover network ?
In the datasheet ( link ) of #1 this condition isn't present, also not here:
https://ampslab.com/blog/2022/04/08/biamppro-bench-test/
That's what I just literally said, "even when the minimum gain requirement is being met".
Meaning that power amps need more than just unity gain.
It's a general statement, might as well that it works TDA2030/50, but in my experience your mileage may differ.
Meaning that power amps need more than just unity gain.
It's a general statement, might as well that it works TDA2030/50, but in my experience your mileage may differ.
For further reference, JBL had an amplifier with separate LM3875's filtered for the appropriate driver frequency ranges. If you're industrious you can probably find the design within the pages of DIYAUDIO.