Sawtooth FM generation

With the wealth of knowledge sloshing around here, can someone point
me to a reference/reading for generation of FM using sawtooth pulses?
That's all i have to go on, well, that, and the fact that there was a
bandlimiting filter prior to the FM modulation and then translation to
IF.  Any suggestions?  This is probably a common technique with a
funny name.

col

On Apr 10, 8:45 am, cb...@hotmail.com wrote:
> With the wealth of knowledge sloshing around here, can someone point
> me to a reference/reading for generation of FM using sawtooth pulses?
> That's all i have to go on, well, that, and the fact that there was a
> bandlimiting filter prior to the FM modulation and then translation to
> IF.  Any suggestions?  This is probably a common technique with a
> funny name.
>
> col

Best way is to have a VCO set to the IF frequency which you then
modulate with the baseband signal. Then up-convert with a multiplier.

On Apr 9, 1:45 pm, cb...@hotmail.com wrote:
> With the wealth of knowledge sloshing around here, can someone point
> me to a reference/reading for generation of FM using sawtooth pulses?
> That's all i have to go on, well, that, and the fact that there was a
> bandlimiting filter prior to the FM modulation and then translation to
> IF.  Any suggestions?  This is probably a common technique with a
> funny name.
>
> col

You might Google on "FM modulation sawtooth", without the quotes.
There is a lot to read there.

Dale B. Dalrymple
http://dbdimages.com

On Apr 9, 4:45�pm, cb...@hotmail.com wrote:
> With the wealth of knowledge sloshing around here, can someone point
> me to a reference/reading for generation of FM using sawtooth pulses?
> That's all i have to go on, well, that, and the fact that there was a
> bandlimiting filter prior to the FM modulation and then translation to
> IF. �Any suggestions? �This is probably a common technique with a
> funny name.
>
> col

serrasoid phase modulator

Mark

On Apr 9, 5:08 pm, Mark <makol...@yahoo.com> wrote:
> On Apr 9, 4:45 pm, cb...@hotmail.com wrote:
>
> > With the wealth of knowledge sloshing around here, can someone point
> > me to a reference/reading for generation of FM using sawtooth pulses?
> > That's all i have to go on, well, that, and the fact that there was a
> > bandlimiting filter prior to the FM modulation and then translation to
> > IF.  Any suggestions?  This is probably a common technique with a
> > funny name.
>
> > col
>
> serrasoid phase modulator
>
> Mark

Wow, that was fast.  Serrasoid is the winner it seems.  I knew there
would be a name for it.  Thanks.

col

On Apr 9, 2:16 pm, cb...@hotmail.com wrote:
> On Apr 9, 5:08 pm, Mark <makol...@yahoo.com> wrote:
>
> > On Apr 9, 4:45 pm, cb...@hotmail.com wrote:
>
> > > With the wealth of knowledge sloshing around here, can someone point
> > > me to a reference/reading for generation of FM using sawtooth pulses?
> > > That's all i have to go on, well, that, and the fact that there was a
> > > bandlimiting filter prior to the FM modulation and then translation to
> > > IF.  Any suggestions?  This is probably a common technique with a
> > > funny name.
>
> > > col
>
> > serrasoid phase modulator
>
> > Mark
>
> Wow, that was fast.  Serrasoid is the winner it seems.  I knew there
> would be a name for it.  Thanks.
>
> col

Of course, 'serrasoidal modulator' appears twice in the first eight
Google citations without even needing to click through. That would
have been even quicker.

Dale B. Dalrymple

On Apr 9, 8:58 pm, dbd <d...@ieee.org> wrote:
> On Apr 9, 2:16 pm, cb...@hotmail.com wrote:
>
>
>
> > On Apr 9, 5:08 pm, Mark <makol...@yahoo.com> wrote:
>
> > > On Apr 9, 4:45 pm, cb...@hotmail.com wrote:
>
> > > > With the wealth of knowledge sloshing around here, can someone point
> > > > me to a reference/reading for generation of FM using sawtooth pulses?
> > > > That's all i have to go on, well, that, and the fact that there was a
> > > > bandlimiting filter prior to the FM modulation and then translation to
> > > > IF.  Any suggestions?  This is probably a common technique with a
> > > > funny name.
>
> > > > col
>
> > > serrasoid phase modulator
>
> > > Mark
>
> > Wow, that was fast.  Serrasoid is the winner it seems.  I knew there
> > would be a name for it.  Thanks.
>
> > col
>
> Of course, 'serrasoidal modulator' appears twice in the first eight
> Google citations without even needing to click through. That would
> have been even quicker.
>
> Dale B. Dalrymple

Easy there chief.  The first hit did indeed include serrasoid
modulator but was from freepatentsonline which is terrible to read.
The second is a pdf that doesn't really explain the operation and thus
didn't confirm that that was what it was called.  Make sure you take
your calming pills next time before you post.

cheers,

col

On Apr 10, 7:34 am, cb...@hotmail.com wrote:
> On Apr 9, 8:58 pm, dbd <d...@ieee.org> wrote:
>
>
>
> > On Apr 9, 2:16 pm, cb...@hotmail.com wrote:
>
> > > On Apr 9, 5:08 pm, Mark <makol...@yahoo.com> wrote:
>
> > > > On Apr 9, 4:45 pm, cb...@hotmail.com wrote:
>
> > > > > With the wealth of knowledge sloshing around here, can someone point
> > > > > me to a reference/reading for generation of FM using sawtooth pulses?
> > > > > That's all i have to go on, well, that, and the fact that there was a
> > > > > bandlimiting filter prior to the FM modulation and then translation to
> > > > > IF.  Any suggestions?  This is probably a common technique with a
> > > > > funny name.
>
> > > > > col
>
> > > > serrasoid phase modulator
>
> > > > Mark
>
> > > Wow, that was fast.  Serrasoid is the winner it seems.  I knew there
> > > would be a name for it.  Thanks.
>
> > > col
>
> > Of course, 'serrasoidal modulator' appears twice in the first eight
> > Google citations without even needing to click through. That would
> > have been even quicker.
>
> > Dale B. Dalrymple
>
> Easy there chief.  The first hit did indeed include serrasoid
> modulator but was from freepatentsonline which is terrible to read.
> The second is a pdf that doesn't really explain the operation and thus
> didn't confirm that that was what it was called.  Make sure you take
> your calming pills next time before you post.
>
> cheers,
>
> col


You didn't ask for an explanation, you asked for the name. The Google
on "FM modulation sawtooth" got that. If you want to check an
explanation then you should Google on "serrasoidal modulator". If you
take any term you get from comp.dsp without checking it on Google or
elsewhere (better yet, Google and elsewhere) you run the risk of
finding that you got what you paid for.

Why do you think someone would have to be agitated to explain a
helpful comment to you?

Dale B. Dalrymple