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Drawn current from a two and single supply Class B power amplifier

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paulmdrdo

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I was reading a section from a book that talks about class B amplifier. I don't quite understand what the author meant in the highlighted part. Can someone help me picture what the author is trying to convey? I know what full-wave and rectified signals are but I can't quite connect it to what the book is saying.
2020-05-29 15_03_04-Robert L. Boylestad, Louis Nashelsky - Electronic Devices and Circuit Theory.png2020-05-29 15_05_14-Robert L. Boylestad, Louis Nashelsky - Electronic Devices and Circuit Theory.png
 

In single supply the same supply supplies current for both half of circuit.
In dual supply , each supply supply current only for that part of the waveform.
 

srizbf said:
In single supply the same supply supplies current for both half of circuit.
In dual supply , each supply supply current only for that part of the waveform.
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In your first statement, isn't one half of the circuit turned off every one complete cycle? Therefore it just would be like a half-wave rectified signal?
 

Each half will be amplifying for the respective half cycle.
 

srizbf said:
Each half will be amplifying for the respective half cycle.
Click to expand...

Yes. That would be the same with the dual supply right? Therefore the current drawn has also the form of halfwave rectified signal not full-wave?
 

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