RadioBanter - View Single Post

February 22nd 04, 08:39 PM

In article , (Tom
Bruhns) writes:

(Avery Fineman) wrote in message
...
... Suffice to say
that a square wave cannot be used with a passive diode doubler; all
the energy is contained in the short transition times and that is rarely
enough to be worth it.

?? Lots of energy in the fundamental; filter to extract the
fundamental and feed it to your full-wave rectifier doubler.
Efficiency can be high if the filter does not cause dissipation in the
source at the harmonics.

Sorry. If you are using the passive diode doubler looking like a
full-wave rectifier circuit, and you have a symmetric square wave,
the only harmonics you get are from the transition edges.

Symmetric square waves have very low even harmonic energy
content; harmonics are in the odd harmonic frequencies.

A non-symmetric rectangular (not a 'square') waveform has more
even-harmonic energy content.

Len Anderson
retired (from regular hours) electronic engineer person

Apologies tendered for inappropriate, incomplete prior posting. Bell's
machine rang for a talk about another subject thread and I forgot to
complete this one. :-( LHA