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What is a Class-J Amplifier configuration?

Does it work in a push-pull configuration similar to an A/B? How is it physically different to an A/B? Where can I see a basic schematic?

I have read through the literature on IEEE Xplore on the efficiency of Class-J amplifiers over wide bandwidth; but I still cant understand how the configuration actually works.

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  • \$\begingroup\$ An answer to this question would require at least one book to write. I doubt that you did not understand anything about it, so what about you ask some more concrete question about a specific aspect? \$\endgroup\$ – PlasmaHH Apr 28 '15 at 8:24
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    \$\begingroup\$ Thanks for the quick reply. Ok.. "Does a Class J amplifier work in a push-pull configuration similar to an A/B?" \$\endgroup\$ – Brendan Apr 28 '15 at 10:16
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No, class J has a single transistor, just as class B amplifier + crazy RF magic to increase efficiency. This paper is pretty clear about it:

A class-J amplifier is biased as a conventional “deep” class-AB PA that will be considered hereafter in the analytical development as class-B. Thus, a class-J PA demonstrates very similar drain current waveform to its class-B counterpart.

Integrated Design of a Class-J Power Amplifier by S Rezaei

This paper also contains schematics, if you are curious.

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