Phase inverting one half of a push-pull parrallel channel before recombining? - diyAudio
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Old 22nd March 2009, 02:13 PM   #1
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Default 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?
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Old 23rd March 2009, 04:03 PM   #2
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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.
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Old 23rd March 2009, 05:43 PM   #3
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Are you asking about transformer-coupled audio amplifiers or switching power supplies?
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Old 23rd March 2009, 07:04 PM   #4
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Audio amplifiers. I was thinking of how to improve harmonic spectrum of push-pull amp types like AB.
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