Class E RF Amplifiers Explained - Circuit Analysis (Part 4)

Part 4 analyzes a class E RF amplifier and shows how this topology achieves very high efficiencies. The video demonstrated the circuits operation, shows the relevant waveforms, and calculated the drain efficiency of an IRF510 MOSFET transistor.

Class E Simulator:

Sokal's White Paper:

[barryanderson]

Hello ... Great stuff. I've enjoyed your channel for a few years. I would really appreciate your spreadsheet. How would one get in touch ??

[ats]

It's hard to quibble with the highly efficient result you measured, but if the goal is to have a high Q 700 nH inductor, an air core should produce a better result than a powered iron core, with the reduced core losses more than making up for the increased wire losses. An air core with 700nH and a Q of 300 is pretty straightforward. I'm curious what you are achieving with the powdered iron core...

[gmarf]

Interest video series, thanks. I see you drove it by a square wave. Sokal claims designs have been made up to GHz. Even at 144MHz a square wave would be difficult to achieve, so can you drive with less-than perfect square to switch the amplifier. Secondly NBFM would not problem, but what about DSB or SSB.

[MegaCadr]

What is the preamplifier you are using? Thanks for the great video!