Phase inverting one half of a push-pull parrallel channel before recombining?

Test Electrix · 22nd March 2009, 02:13 PM

Right my understanding of push-pull is that the voltage swing is split between 2 channels which amplify either half (maybe not the best description...), couldn't you invert the phase of one channel so there's not harmonic cancellation?

Electrone · 23rd March 2009, 04:03 PM

At least somewhat, so long as the duty cycle is set to maximum, if I understand you. But normally the 180 degree phasing is beneficial for greatly reducing current peaks.

Eva · 23rd March 2009, 05:43 PM

Are you asking about transformer-coupled audio amplifiers or switching power supplies?

Test Electrix · 23rd March 2009, 07:04 PM

Audio amplifiers. I was thinking of how to improve harmonic spectrum of push-pull amp types like AB.

22nd March 2009, 02:13 PM	#1
Test Electrix diyAudio Member Join Date: Mar 2009	Phase inverting one half of a push-pull parrallel channel before recombining? Right my understanding of push-pull is that the voltage swing is split between 2 channels which amplify either half (maybe not the best description...), couldn't you invert the phase of one channel so there's not harmonic cancellation?

23rd March 2009, 05:43 PM	#3
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	Are you asking about transformer-coupled audio amplifiers or switching power supplies? __________________ I use to feel like the small child in The Emperor's New Clothes tale

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23rd March 2009, 04:03 PM	#2
Electrone diyAudio Member Join Date: Jan 2007	At least somewhat, so long as the duty cycle is set to maximum, if I understand you. But normally the 180 degree phasing is beneficial for greatly reducing current peaks.

23rd March 2009, 07:04 PM	#4
Test Electrix diyAudio Member Join Date: Mar 2009	Audio amplifiers. I was thinking of how to improve harmonic spectrum of push-pull amp types like AB.