Is that a joule thief?

[Jeg]

Hi
I would like to ask if the classic topology of transistor with a feedback coil, is actually a joule thief. What it makes me confused is that the feedback uses less turns than collector's coil, the opposite of the classic Joule Ringer topology.. see below
tnks

[Groundloop]

Hi Jeg,

I do not know if there is a definition of a Joule Thief circuit, but
when people say Joule Thief, I always think about a small power oscillator
that can run down a AA size battery fully, and give light to one or many ultra bright LED.

The circuit you posted is a power oscillator capable of generating many Watts of
power to the output. You can get whatever voltage output from the circuit you want,
depending on the turn ratio of the input power coil and output coil.

Thanks for posting and welcome to the forum. :-)

GL.

[Jeg]

Thank you Groundloop, nice to meet you all here.

[Dave45]

I was just studying the circuit thinking we make transformers that put out high voltage or high amperage why not do both 

[Dave45]

I would think the primary's would need to be the same weight, the same with the secondary's.

The circuit would be lopsided but the mosfet's are triggered from the bemf of the coils so it should work.