Reply by Tim Wescott ●November 3, 20132013-11-03
On Sun, 03 Nov 2013 01:14:32 -0700, jurb6006 wrote:


>>"I don't believe that Signetics ever had a single chip PLL synthesizer
> chip, for AM/FM or otherwise."
> 
> I think they did. It was a single chip solution used in tuners installed
> in NAP products in the US, like Maganvox, Grosley and who knows. the
> number did start with SA, and I tried to figure out what it was after
> that but gave up. google is good but.....
> 
> It was a standard bus controlled PLL for NTSC US and I think it had an
> internal prescaler. the othe rchip in the tuner IIRC was the
> mixer/oscillator.
> 
> I doubt the chip was locked into the NTSC TV band so with the right data
> it could be used in anything witin its range, which would be from 54 Mhz
> to 0.89 Ghz.
> 
> In the next few days, since this is inexorably stuck in my head, I will
> check a couple of databases using different numbers out of memory to see
> if I can hit the chip number. Send beer.


That matches my recollection.  The ones that I recall looking at were 
pretty specific to use -- when they said "TV tuner" that's what they 
meant, and you didn't have much options to successfully wedge it into a 
marine-band radio.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Reply by Tim Wescott ●November 3, 20132013-11-03
On Sun, 03 Nov 2013 01:48:53 -0600, John S wrote:


> On 11/2/2013 8:36 PM, bitrex wrote:
>> I'm trying to remember the name of a certain IC.  I believe it was a
>> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
>> external local oscillator.  I'm fairly certain it had the prefix
>> SA-something, so it was a former Signetics chip.  I don't think it's
>> still in production by NXP, though.
>>
>> Any ideas?
> 
> SA612, perhaps?


That's a mixer, not a synthesizer chip.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
Reply by bitrex ●November 3, 20132013-11-03
On 11/3/2013 3:13 AM, Piotr Piatek wrote:

> On 03.11.2013 02:36, bitrex wrote:
>> I'm trying to remember the name of a certain IC.  I believe it was a
>> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
>> external local oscillator.  I'm fairly certain it had the prefix
>> SA-something, so it was a former Signetics chip.  I don't think it's
>> still in production by NXP, though.
>>
>> Any ideas?
>
> SAA1057 perhaps?
> or earlier SAA1056 + SAA1059?
>


Yes! The SAA1057. Thanks!
Reply by ●November 3, 20132013-11-03
>"I don't believe that Signetics ever had a single chip PLL synthesizer 

chip, for AM/FM or otherwise."

I think they did. It was a single chip solution used in tuners installed in NAP products in the US, like Maganvox, Grosley and who knows. the number did start with SA, and I tried to figure out what it was after that but gave up. google is good but.....

It was a standard bus controlled PLL for NTSC US and I think it had an internal prescaler. the othe rchip in the tuner IIRC was the mixer/oscillator. 

I doubt the chip was locked into the NTSC TV band so with the right data it could be used in anything witin its range, which would be from 54 Mhz to 0.89 Ghz. 

In the next few days, since this is inexorably stuck in my head, I will check a couple of databases using different numbers out of memory to see if I can hit the chip number. Send beer.
Reply by Piotr Piatek ●November 3, 20132013-11-03
On 03.11.2013 02:36, bitrex wrote:

> I'm trying to remember the name of a certain IC.  I believe it was a
> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
> external local oscillator.  I'm fairly certain it had the prefix
> SA-something, so it was a former Signetics chip.  I don't think it's
> still in production by NXP, though.
>
> Any ideas?


SAA1057 perhaps?
or earlier SAA1056 + SAA1059?
Reply by John S ●November 3, 20132013-11-03
On 11/2/2013 8:36 PM, bitrex wrote:

> I'm trying to remember the name of a certain IC.  I believe it was a
> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
> external local oscillator.  I'm fairly certain it had the prefix
> SA-something, so it was a former Signetics chip.  I don't think it's
> still in production by NXP, though.
>
> Any ideas?


SA612, perhaps?
Reply by Martin Riddle ●November 3, 20132013-11-03
On Sat, 02 Nov 2013 21:36:38 -0400, bitrex
<bitrex@de.lete.earthlink.net> wrote:


>I'm trying to remember the name of a certain IC.  I believe it was a 
>PLL-type frequency synthesizer IC for AM/FM radios, to be used with an 
>external local oscillator.  I'm fairly certain it had the prefix 
>SA-something, so it was a former Signetics chip.  I don't think it's 
>still in production by NXP, though.
>
>Any ideas?


NE565?
TA2003?

Cheers
Reply by Jan Panteltje ●November 3, 20132013-11-03
On a sunny day (Sun, 03 Nov 2013 01:00:51 -0500) it happened bitrex
<bitrex@de.lete.earthlink.net> wrote in
<JqSdnVnUsooIe-jPnZ2dnUVZ_tmdnZ2d@earthlink.com>:


>On 11/2/2013 10:28 PM, Jeff Liebermann wrote:
>> On Sat, 02 Nov 2013 21:36:38 -0400, bitrex
>> <bitrex@de.lete.earthlink.net> wrote:
>>
>>> I'm trying to remember the name of a certain IC.  I believe it was a
>>> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
>>> external local oscillator.  I'm fairly certain it had the prefix
>>> SA-something, so it was a former Signetics chip.  I don't think it's
>>> still in production by NXP, though.
>>
>> SAF7730 perhaps.  That was the a DSP IF chip usually used with a
>> TEF6730 as the front end and LO.  Sony used it in their nifty XDR-F1HD
>> tuner.  There are other similar chips... this may help:
>> <http://www.audiosound.info/katlisty/Philips%20DSP%20procesors.pdf>
>>
>>
>>
>>
>
>Thanks for the reply, but I'm not sure that it's the one I'm thinking 
>of.  This was a much older and less sophisticated IC - it was probably 
>available in the early 1980s.  Came in a DIP package.  I know my request 
>was rather vague.  I'll see if I can remember more about it.


Try typing 'synthesizer' with some numbers in ebay search.
I was looking for one a while back and found many old chips.
Finally did it in FPGA though.
Reply by Jeff Liebermann ●November 3, 20132013-11-03
On Sun, 03 Nov 2013 01:00:51 -0500, bitrex
<bitrex@de.lete.earthlink.net> wrote:


>On 11/2/2013 10:28 PM, Jeff Liebermann wrote:
>> On Sat, 02 Nov 2013 21:36:38 -0400, bitrex
>> <bitrex@de.lete.earthlink.net> wrote:
>>
>>> I'm trying to remember the name of a certain IC.  I believe it was a
>>> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
>>> external local oscillator.  I'm fairly certain it had the prefix
>>> SA-something, so it was a former Signetics chip.  I don't think it's
>>> still in production by NXP, though.
>>
>> SAF7730 perhaps.  That was the a DSP IF chip usually used with a
>> TEF6730 as the front end and LO.  Sony used it in their nifty XDR-F1HD
>> tuner.  There are other similar chips... this may help:
>> <http://www.audiosound.info/katlisty/Philips%20DSP%20procesors.pdf>



>Thanks for the reply, but I'm not sure that it's the one I'm thinking 
>of.  This was a much older and less sophisticated IC - it was probably 
>available in the early 1980s.  Came in a DIP package.  I know my request 
>was rather vague.  I'll see if I can remember more about it.


I don't believe that Signetics ever had a single chip PLL synthesizer
chip, for AM/FM or otherwise.  I was designing marine and commerical
radios at the time, and would have been aware of such a device.  In
the early 1980's, the high fashion single chip synthesizer was by
Motorola:
<http://www.qsl.net/n9zia/spec/MC145151-2.pdf>
Wrong prefix and manufactory, but a fairly close description.  


>I know my request 
>was rather vague.  I'll see if I can remember more about it.


If it's a PLL synthesizer chip, perhaps a better clue as to the
application, frequency range, control method, etc might limit the
search.

-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558
Reply by bitrex ●November 3, 20132013-11-03
On 11/2/2013 10:28 PM, Jeff Liebermann wrote:

> On Sat, 02 Nov 2013 21:36:38 -0400, bitrex
> <bitrex@de.lete.earthlink.net> wrote:
>
>> I'm trying to remember the name of a certain IC.  I believe it was a
>> PLL-type frequency synthesizer IC for AM/FM radios, to be used with an
>> external local oscillator.  I'm fairly certain it had the prefix
>> SA-something, so it was a former Signetics chip.  I don't think it's
>> still in production by NXP, though.
>
> SAF7730 perhaps.  That was the a DSP IF chip usually used with a
> TEF6730 as the front end and LO.  Sony used it in their nifty XDR-F1HD
> tuner.  There are other similar chips... this may help:
> <http://www.audiosound.info/katlisty/Philips%20DSP%20procesors.pdf>
>
>
>
>


Thanks for the reply, but I'm not sure that it's the one I'm thinking 
of.  This was a much older and less sophisticated IC - it was probably 
available in the early 1980s.  Came in a DIP package.  I know my request 
was rather vague.  I'll see if I can remember more about it.