PLL frequency multiplier.

[Joerg]

This would be too hard for me, but it is understandable that you need
something harder to forget a good Koelsch or Hefeweizen

Oh, I'll never forget Frueh Koelsch. We've got good Hefeweizen here,
Widmer's, the one Jim mentioned. But it's just not quite as good as some
Bavarian varieties and it's pronounced "Heffawhysen" out here.

 

[Joerg]

On Fri, 04 Jul 2008 13:14:44 -0700, Joerg

Tim Wescott wrote:
[snip]
Fortunately this is a hobby project, so the most important specification
you have to meet is "am I having fun yet". It's amazing how much stress
you can relieve by temporarily abandoning things like fast lock, absence
of overshoot, and noise immunity while you're concentrating on getting a
pretty picture.

The best stress relief will be that you don't have to whip it through a
standards body review process, EMC certification and all that. Got to do
one of those again next week. Oh what fun ... where's that tequila bottle?
Tequila?? I've got to introduce you to some better "stuff" ;-)

...Jim Thompson

Ouzo?


martin

I like Ouzo, though I like Sambuca better... isn't it the Italian
equivalent? (I find Ouzo a little weak-kneed ;-)

I also like blinies with caviar and ice-cold Vodka shots ;-)

Where do you get caviar? I mean the real deal.

 

[Jamie]

yea i could do it that way, just the picture will be smaller or taller
vertically if the vertical scan clock is too fast or too slow.

I was thinking about using the sync pulse to trigger INT0, but then i could
set, reset the timer and use it as a TOP value on a overflow interrupt, so
the overflow interrupt will scan it vertically, that way its always locked.


"Mike" <[email protected]> wrote in message

Maybe Slow Scan TV (SSTV) would interest you ?
Lots of it being done on the HF radio these days via the
sound card.
If you ever get interested in how the various formats
are spec'd out, I could give you some info.

http://webpages.charter.net/jamie_5"

 

[Mike]

thanks for hijacking my thread, i appricate that.

On Fri, 04 Jul 2008 22:44:09 +0200, Martin Griffith

On Fri, 04 Jul 2008 13:32:53 -0700, in sci.electronics.design Jim

On Fri, 04 Jul 2008 13:14:44 -0700, Joerg

Tim Wescott wrote:
[snip]
Fortunately this is a hobby project, so the most important
specification
you have to meet is "am I having fun yet". It's amazing how much
stress
you can relieve by temporarily abandoning things like fast lock,
absence
of overshoot, and noise immunity while you're concentrating on
getting a
pretty picture.

The best stress relief will be that you don't have to whip it through
a
standards body review process, EMC certification and all that. Got to
do
one of those again next week. Oh what fun ... where's that tequila
bottle?
Tequila?? I've got to introduce you to some better "stuff" ;-)

...Jim Thompson
Ouzo?


martin

I like Ouzo, though I like Sambuca better... isn't it the Italian
equivalent? (I find Ouzo a little weak-kneed ;-)

I also like blinies with caviar and ice-cold Vodka shots ;-)

Where do you get caviar? I mean the real deal.

From Germany... in 1998 I brought back two 2kg tins of Russian caviar,
obtained for me by the Russian wife of my client at Bosch, Bühlertal.
Customs really didn't know what it was and passed me right through ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
| |
| Vote Barack... Help Make America an Obama-nation |
| |
| Due to excessive spam, googlegroups, UAR & AIOE are blocked! |

 

[JosephKK]

Well timing has to be rather critical. its being used in a narrow band
video sync. so it has to be accurate.

Well, see i play around with NBTV scanning disk television as a hobby.
I was going to make an NBTV emulator with a 32x48 LED matrix.

since it is a 32 line resolution, at 12.5 frames per second, you have
a line sync of 400hz.

the problem is theres 48 vertical resolution pixels per 1 line scan.
so that means i would have to multiply my 400hz pulse by 48 or 19.2khz
to scan the vertical LEDs to keep them in sync.

Im going to be using an ATmel AVR, so if you know of a way to make a
multiplier out of an AVR CPU. let me know.

Thanks!

How weird, you just lit up all of my "wrong approach" alarms.

 

[Mike]

What do you mean by that?

How weird, you just lit up all of my "wrong approach" alarms.

 

[JosephKK]

Jim Thompson wrote:
On Fri, 04 Jul 2008 13:14:44 -0700, Joerg

Tim Wescott wrote:
[snip]
Fortunately this is a hobby project, so the most important specification
you have to meet is "am I having fun yet". It's amazing how much stress
you can relieve by temporarily abandoning things like fast lock, absence
of overshoot, and noise immunity while you're concentrating on getting a
pretty picture.

The best stress relief will be that you don't have to whip it through a
standards body review process, EMC certification and all that. Got to do
one of those again next week. Oh what fun ... where's that tequila bottle?
Tequila?? I've got to introduce you to some better "stuff" ;-)

I used to like fine cognac and single-malt but somehow I don't fancy the
hard stuff much anymore. I do like margaritas though. Oh, and we just
became club members here:

http://www.madronavineyards.com/

Good stuff?

I prefer wine, though I'll have a _very_ occasional beer when it's
really hot. (Widmer Hefeweizen that Larkin introduced me to is one of
my favorites... most American beers are so "lite" as to be tasteless.)

That's what they are making, wine. And you probably never tasted
American stuff like this:

http://www.placervillebrewing.com/our_beer.asp

And I like Dry Sack Sherry as an aperitif, and Drambuie, and Jack
Daniels and... ;-)

Hennessy, Camus, Glenlivet, Beerenburger would be da good stuff

Substitute Laphroaig for Glenlivet.
Napoleon Grand Fine is above what i will pay now.

 

[Mike]

the CD4059 is going to serve as my divider in the PLL circuit, it seems it
can handle a division by 48 all in itself.

 

[Mike]

like what.

Certainly. It's a programmable counter, as I suggested in a prior
post.

You might consider something more modern ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

It's what you learn, after you know it all, that counts.

Due to excessive spam, gmail, googlegroups, UAR, AIOE are blocked!

 

[JosephKK]

What do you mean by that?

It means that i cannot find an erroneous cause of the alarms, nor can
i find what is wrong with the approach. At least not in any way i can
explain. Perhaps you can go into more detail about the modulation
methods. I can get any uC to multiply and divide, albeit slowly, my
issues start with these multiplies are slow, can you run an accurate
software pll and demodulator with the slow multiply? It would be easy
in hardware with a couple 22V10s.

 

[JosephKK]

Stop top posting and snipping pertinent portions of the thread.

Also use a competent reader which follows the rules for signature
deletion.

Use something like a 74HC292

though you should sharpen your own skills by making your own DIV3
followed by DIV16.

...Jim Thompson

For that ratio i prefer div 8 followed by div 6. Or vice versa,
depending on the locking wave shape you want.

 

[MooseFET]

For that ratio i prefer div 8 followed by div 6.  Or vice versa,
depending on the locking wave shape you want.

The type-2 phase detector is edge operated so you can even use a thin
pulse for it.

If you make the last two divides two, you can use an XOR to make a 90
degree shifted version of the counter output. This is handy when
using the XOR type phase detector that makes a 90 degree shift at
locked.

 

[Mike]

WTF are you talking about:

Stop top posting and snipping pertinent portions of the thread.

Also use a competent reader which follows the rules for signature
deletion.

you got a bad attitude. a really bad one. so **** off.

 

[Mike]

yeap, and definition is never defined ;-)

WTF are you talking about:


you got a bad attitude. a really bad one. so **** off.

[snip]

And you are ignorant beyond definition. Bye!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

It's what you learn, after you know it all, that counts.

Due to excessive spam, gmail, googlegroups, UAR, and AIOE blocked!