Just did a refurbished lamp powered by a 2222 based joule thief circuit.
n-channel MOSFET master race reporting in
Ah, these youngsters with their PNPs and NPNs
Though I prefer the lieanrity of BJTs in amplification, I wouldn't ever trade them for tubes regarding guitar or hi-fi high armonic content, high-power radio transmission, or nuclear safe applications.
high-k metal gate of course, so titanium nitride with polysilicon on top