>Are "ceramic filters" the same as "ceramic resonators" ?  I can go into the
>local surplus store and find little three-lead devices labled "ceramic
filters"
>in all sorts of nice frequencies (ie 6MHz.), as well as "ceramic
resonators"
>in a more limitted range (3.58MHz)  Will both of these work in the
oscillator
>circuit of a PIC?
>
>Thanks
>bill W


The resonators will, but the filters have wider bandpass that could get into
some
real wierd operation. You could get them to oscillate in a series mode
circuit, and
they would run at some freq within their bandwidth (not necesarily the
center!) but
I'd be nervous that they might shift freqs with temp change.

The filters are designed to pass a range of freqs, where a xtal is designed
to pass
(or be high impedance at) one frequency.