Hi Hank,

I've never checked it specifically....and have only ballpark figures
for Q.

There is one other oddity that you probably should be aware of.... The
output voltage is not in the same phase as the input voltage. While
this isn't a great problem, do be aware that the phase difference
between the input/output also changes with temperature, and resistive
loading.

This totally precludes using them in a power oscillator circuit, which
is a bummer. They would be so simple to drive if the phase difference
was relatively constant::

I just read about a new driver chip that constantly measures and
corrects for this phase difference, and in so doing the device always
operates at peak efficiency.

There are other piezoceramics that are usable as filters and such,
goggle for them.

Regards,

Mebart

On Mon, 09 May 2005 18:56:21 GMT, "Henry Kolesnik"
wrote:

Hey Mebart, and a good day to you too. Mehank

On a more serious note, thanks for both posts. I took a look at the
Panasonic at Digikey and it looks like they're made for ~50:1 stepup to
light up displays. http://dkc3.digikey.com/PDF/T052/1522.pdf
Have you ever checked the passband of one?