will c1 and c3 discharge in c2 and c4

[t1990]

hi
will c1 and c3 discharge in c2 and c4 in this circuit? and can something like this be used for charge recycling?

 

[RetroTechie]

I suppose it would help to regard all FETs as switches, and make a few simple drawings of their individual states, depending on voltage on "IN" point(s?).

That would make it much easier to see what happens with each capacitor's charge. I must admit I don't know FETs well enough to make it obvious what the circuit does - but if I had to take a guess, it looks like some sort of charge pump circuit...