The 636 will do fsk, i just suggest ask as lower cost.  I have a couple
years design experience with this chip.

On Thu, Sep 13, 2018, 8:56 AM Harold Hallikainen <harold@mai.hallikainen.or=
g>
wrote:

> Thanks for the idea! I think FSK would be more reliable than ASK. With th=
e
> current design, I see all these parts around the SA639, then I look at th=
e
> Silicon Labs FM receiver chips where you hook up an antenna and get audio
> out and am envious!
>
> Harold
>
> > Is the frequency shift wide enough that you could use a narrow filter a=
nd
> > treat it as ASK?
> > The SA636 might work for you without messing with the discriminator par=
t
> > if so.
> >
> >
> > -----Original Message-----
> > From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> On Behalf Of
> > Harold Hallikainen
> > Sent: Thursday, September 13, 2018 7:35 AM
> > To: Microcontroller discussion list - Public. <piclist@mit.edu>
> > Subject: RE: [EE] FSK receiver chips?
> >
> > Interesting idea. This is a battery operated device, and I wonder about
> > power consumption. Also, my DSP experience is close to none! I'm
> currently
> > using the SA639 and driving a PIC18 to do packet decoding, drive a
> > display, etc. If going to DSP demodulation in a PIC (as opposed to usin=
g
> a
> > standard receiver chip), it would be interesting to move everything to
> one
> > chip (demodulation, packet parsing, etc.) but, again, I worry about pow=
er
> > consumption.
> >
> > Thanks for the idea! I'll look into it.
> >
> > Harold
> >
> >
> >
> >> Develop your own using a dsPic ?
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> On Behalf Of
> >> Harold Hallikainen
> >> Sent: 12 September 2018 22:33
> >> To: Pic List <piclist@mit.edu>
> >> Subject: [EE] FSK receiver chips?
> >>
> >> I'm currently using an SA639 as an FSK receiver. My FSK is at 1.8 MHz
> >> (on IR). I use the mixer in the SA639 to upconvert to 10.7 HHz, then
> >> use ceramic filters in the IF and a ceramic resonator in the
> >> quadrature detector. I'm seeing single chip DSP-based FM receivers
> >> (from places like Silicon Labs). Does anyone know of any DSP-based FSK
> >> receiver chips? I could get rid of a lot of parts!
> >>
> >> Thanks!
> >>
> >> Harold
> >>
> >>
> >>
> >> --
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> >> iPhone.
> >> --
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> >
> >
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>
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