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audio recording on IC -help wanted

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Guest

Wed Jun 01, 2016 11:54 pm   



On Sunday, October 31, 1999 at 7:00:00 AM UTC, neil wrote:
Quote:
Anybody recommend a VCO IC that will tune 5-35MHz. Square wave output is
OK.

--
Neil
http://www.aade.com
mailto:neil_at_aade.com
Almost All Digital Electronics
1412 Elm St. SE
Auburn, WA 98092
253-351-9316


Just idea to get people thinking. 74 f Series would be better, more hz error the lower the output freq. also square waves best for saturating switching mixers and no chance of hysterisis.
i didnt notice the date of post comes close to top of search list though.
Roger

legg
Guest

Thu Jun 02, 2016 7:30 am   



On Wed, 1 Jun 2016 14:54:55 -0700 (PDT), rgo.else_at_gmail.com wrote:

Quote:
On Sunday, October 31, 1999 at 7:00:00 AM UTC, neil wrote:
Anybody recommend a VCO IC that will tune 5-35MHz. Square wave output is
OK.

--
Neil
http://www.aade.com
mailto:neil_at_aade.com
Almost All Digital Electronics
1412 Elm St. SE
Auburn, WA 98092
253-351-9316

Just idea to get people thinking. 74 f Series would be better, more hz error the lower the output freq. also square waves best for saturating switching mixers and no chance of hysterisis.
i didnt notice the date of post comes close to top of search list though.
Roger


Note the original poster.

Worth it just for the memories.

RL

Brian Gregory
Guest

Fri Jun 03, 2016 7:30 am   



On 27/05/2016 04:00, Jon Elson wrote:
Quote:
rgo.else_at_gmail.com wrote:

On Sunday, October 31, 1999 at 7:00:00 AM UTC, neil wrote:
Anybody recommend a VCO IC that will tune 5-35MHz. Square wave output is
OK.

--
Neil
http://www.aade.com
mailto:neil_at_aade.com
Almost All Digital Electronics
1412 Elm St. SE
Auburn, WA 98092
253-351-9316

Hi if u want 0 to 32mhz in 1 hz steps

clock 24bit counter at 64mhz feed into 24bit comparater use the 64mhz
clock (modules avaliable). For bit 1 use the clock directly.This forms
count to x. then feed output into bi-stable this halfs frequecy to 32mhz
and gives u 50:50 duty cycle. 3x 74ac521 8 bit comparators could be used
not a=b outs fed into a 74ac10 3 input nand this would generate MR for 2 x
74hc4040 by philips which are garanteed to 79mhz clk. with the 3 x 8bit
latchs for the count to x value should fit on a 100 by 100 pcb which u can
get 5off made out in china for 10usd.
Yes, a DDS is the way to go, as long as a little phase noise is acceptable.
But, you won't be able to build this with 74ACxx parts, no way they will
clock at 64 MHz. I don't know where you found this 79 MHz spec, I see 24
MHz, but note that the 4040 is not a synchronous counter, it is a ripple-
carry chain, so the total delay through the string of FFs is 30 ns PER
STAGE, so 360 ns! So, there is no way to decode this as a count, as it will
have a time skew of about one clock time every time one of the FFs toggles.

Jon


He said VCO - Voltage Controlled Oscillator.
And he said it over 16 years ago.

--

Brian Gregory (in the UK).
To email me please remove all the letter vee from my email address.

sms
Guest

Tue Jul 12, 2016 11:09 pm   



On 7/11/2016 7:13 PM, Reinhardt Behm wrote:
Quote:
Ralph Mowery wrote:

In article <0001HW.1D33507700174B6A10BAE03CF_at_news.eternal-
september.org>, not_at_home.cow says...

On 10 Jul 2016, John Larkin writ:

I always pull a few extra of the smaller surface-mount parts. It's
dependable that I'll lose a few before I get them soldered down.

Required SMD tool: vacuum cleaner (hoover to you Empire boys) with empty
bag.

I am glad the resistors and capacitors are only a few cents. If I need
only one or several, I always get atleast 10 of them. Don't usually
loose any if I do. If I don't or the part is several dollars or more
and I get just the required ammount I usually drop one and spend lots of
time looking for it.

We call that here the "umbrella effect". If you have an umbrella with you it
does not rain.


Plus most distributors won't sell you less than 10 at a time.


Guest

Thu Jul 14, 2016 2:05 pm   



On Wednesday, September 29, 2010 at 11:05:37 AM UTC-7, maya wrote:
Quote:
See Hot Sexy Star *Karishma Kapoor Sex Videos At

http://nandanavanam.co.cc

Due to high sex content, i have hidden the videos in an image.
in that website on Right side below search box click on image

and
watch videos in all angles.



Guest

Thu Jul 14, 2016 2:12 pm   



On Wednesday, September 29, 2010 at 11:05:37 AM UTC-7, maya wrote:
Quote:
See Hot Sexy Star *Karishma Kapoor Sex Videos At

http://nandanavanam.co.cc

Due to high sex content, i have hidden the videos in an image.
in that website on Right side below search box click on image

and
watch videos in all angles.



Guest

Fri Apr 07, 2017 4:54 am   



Is 2SD1555 can be use to replace from D5703?

John Robertson
Guest

Fri Apr 07, 2017 7:30 am   



On 2017/04/06 7:54 PM, kimr17712_at_gmail.com wrote:
Quote:
Is 2SD1555 can be use to replace from D5703?


Can't answer about cross-reference, however MCM had the 2SD5703 in stock
a few years ago, and may still.
1-800-551-1522
http://www.mcmelectronics.com/content/en-US/help/pricing

John :-#)#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Benderthe.evilrobot
Guest

Sat Apr 08, 2017 12:42 am   



<kimr17712_at_gmail.com> wrote in message
news:67c78c43-939a-4afb-925f-63b399e68267_at_googlegroups.com...
> Is 2SD1555 can be use to replace from D5703?

Asian transistors invariably leave out the "2S" from the part number printed
on the device.

There are plenty of sites that have data sheet archives.


---
This email has been checked for viruses by AVG.
http://www.avg.com

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