Its certainly much easier with a CT secondary - I think you can do it by capacitively coupling a pair of BR blocks, but you need big caps for appreciable current and you usually end up with a voltage doubling rectifier. Capacitive coupling gives you something resembling a current limited supply, so its not all bad. The dead simple way is + & - half wave rectifiers. You need bigger reservoir caps to smooth it - but not that much bigger for a few op-amps.Is this a valid way to get split rail? Looks like a short to me. I see how to do it with CT xfrmer, but can it be done w/o CT?
If T1 is say ~12v feeding the rectifiers. Is it still just 12v Vcc- to Vcc+, (minus the diodes)?
The math says, "double them".triple them for a half-wave supply
No, you can't.i can use the crude + - supply w/o caps in a push-pull ckt.
Apparently - lead acid likes smooth DC charge better, its claimed to be the reason for 3-PH alternators.No, you can't.
That's twice you've said/shown a AC/DC power supply without filter capacitors. That is fine for charging NICAD or SLA betteries, but for almost all electronic circuits you need to at least filter the pulsating DC to remove the majority of the ripple, or add a regulator circuit it to remove all of it. Whatever the opamp in post #1 is intended for, it will not work with unfiltered, rectified AC.
The words; "apparently" & "claimed" are probably worth a closer look.A 3∅ alternator is also more efficient, and requires less copper and magnetic material than a single-phase for the same power output.
That's more or less how it was explained to me - It wasn't even my idea, yet SOME people think I'm "contrary" for relating what I've been told.Isn't the whole idea behind 3-phase is that there is no "hole" in the energy out of a generator
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