FREQ COUNTER help

"Paul Taylor"

Instead of totalling up completed cycles over 1 second, a very high frequency oscillator is gated *on* for one cycle ( or 10 or 100) to count microseconds and decimal divisions thereof.

If you get 15.259 uS - you are home and hosed.

....... Phil

Obviously enugh, a counter driven at 65536kHz - I presume you mean

You will need a stable local oscillator to define your millisecond - traditionally divided down from a 10MHz crystal oscillator, but more precise solutions are available.

A 16-bit wide synchronous counter capable of running at 66MHz isn't entirely trivial. Just stringing together regular TTL or CMOS parts won't work, because the freely available 74F and 74ACT and similar synchronous counters aren't quite fast enough. Making the first stage of your counter out of a separately packaged JK-flip-flop might be enough to get you over the hump, but most of the recent programmalbe logic parts are fast enough and big enough t let you realise a suitable

I would help if you told us more about what you are trying to do.

sorry typo error 65536 (2 to the power of 16)

Phil are these regularly available any where?

Phil do you have any examples ect.... this sounds like the way i should go maybe?

"Paul Taylor"

STOP IT NOW !!!!!!!!!!!!

Plus:

EXPLAIN what the f*ck you ACTUALLY want and WHY !!

So far you are just like any other PITA troll.

......... Phil, grrrrrrrrrrr

Not JUST another EVIL top poster, but a f****it BLANK PAGE poster too.

Observe usenet etiquette - or GO DROP DEAD !!

........ Phil

Thanks for your kind remarks Phil i hope i have it right this time?

--

----------------------------------------------------- Paul Taylor BSC (Hons) Electronics Technician School of Environmental Science University of East Anglia Norwich NR4 7TJ

Phone: +44 (0)1603 592502 Fax: +44 (0)1603 591327

Email: snipped-for-privacy@uea.ac.uk Web:

........ Phil

Phil im not a troll, i am interested in the period counter concept you said about i searched the web and cant seem to find much about it.

Thanks

by the way what is a troll?

Oh Dear

martin

Thanks for that martin so im some bad furry creature......

Sorry john for top posting i think i have got to grips with this newsgroup business now my bottom limit is basically 1hz with a resolution of 1hz to. any of you guys now about period counters Phil was saying that this could be the way to go?

Thanks

No, you've got to get grips with your news reader. Simply move the cursor to the bottom of the original text before starting to type (after deleting irrelevant text). Simple.

Meindert

is this ok? i get help hopefully in the end for the problem i firsted posted for?

i think this is right thanks for all your help i have now mastered writing to a newsgroup