[Ronja] Pyroelectric receiver?

[Gregory Maxwell]

On Nov 29, 2007 9:38 PM, alex dinovitser <adinov at yahoo.com> wrote:
> I am surprised you are using a photodiade for this application because of the
> problems with ambient light and the possibility of DC saturation. Why not use a
> pyroelectric receiver? (which will only be sensitive to the AC signal). With a
> larger area device, you might be able to get *much* better range!!

I can't comment on the Ronja design decisions but I'm puzzled by your
suggestion. I've never seen a pyroelectric detector that was very
past. Most that I've seen have a bandpass no more than 100kHz or so,
while ronja needs a bandpass of many mHz.

Perhaps I just haven't been following pytoelectric detector science.
Could you suggest a part that you think might better fit ronja than
the current PIN diode?