From: cgraber@fwi.com (Sonicguru)
Newsgroups: sci.physics.plasma
Subject: PSU needed can you help??
Organization: http://groups.google.com/


Greetings Again everyone

sorry to post this unrelated laser question just thought maybe one of
you electron focused brainiac's (-; might be able to shed some light
on this for me!

problem:

Working on a rather cool full wave electro-acoustic resonator and need
to drive a rather large piezo stack with 600-800v at 5.6khz-23.7khz
adjustable sine wave output...

current will be somwhere between 125ma-250ma depending on the quantity
of wafers I end up with in the stack and it needs to be quite linear
in output.

Any Idea's poping into your head at the moment?

No audio application amps will swing bigger than 110-125v in bridge
mode typically and I can't for the life of me think of a transformer
type that will be anywhere close to the step (8 or 9 to 1) I need and
yet capable of efficient inductance at that freq.

most audio related big transformers work very poor above 15khz and
really are quite useless at 18khz+

Do any of you know of a cascaded output section amplifier topology
capable of swinging this kind of amplitude at freq?

Many thanks for anyone with ventured knowledge or just thoughts...


Curt