[sdiy] Quad VCA design

Wed May 15 23:46:00 CEST 2013

Hola Oscar,

I located in the Los Angeles, California area.

I worked for Tom Oberheim, located in Santa Monica on 9th St., right after I finished my Master's in Music at UCLA in 1977. BSEE from UCLA in 1975.

Later I started my own business doing Service, Design etc. I licensed the E-Mu Poly Keyboard patent in 1976 and built custom Keyboard systems for Musicians. I went to E-Mu full time in 1982 and then to PPG in Hamburg in 1985-85 time frame.

Upon returning to USA in March 1985, I took a job with Motorola Semi. and worked on the DSP56001 project and I recently left Freescale Inc. on Mid November 2012.

Much of my work was with Consumer and Pro Audio applications using DSP and ARM processors i.e. Home Theater, 3-D Headphones, Sound BAr, Car Head unit etc.

I am working on bring back analogue Modules and some digital modules. At present I need to get my web site running and start to advertise a bit.

Stay tuned...

Terry Shultz
thx1138 at earthlink.net

On May 15, 2013, at 10:42 AM, David G Dixon <dixon at mail.ubc.ca> wrote:

> Well, it's not exciting, like installing a 78L05 backwards (the flat face of
> the TO-92 package literally blew across the room -- it could easily have
> taken out my eye had I been staring at it up close).  When 2164s self
> destruct, there's no outward sign (except overheating, perhaps).  They just
> cease to work, and any circuit with them in will give off a high-pitched
> whine.
> 
> 
>> Self-destruction! And I thought this thread was going to end 
>> up boring ;-)
>> 
>> On Wed, May 15, 2013 at 6:30 PM, David G Dixon 
>> <dixon at mail.ubc.ca> wrote:
>>> I have used V2164 in virtually every module I've designed 
>> in the last 
>>> three years, and it's brilliant.  It has its quirks (you 
>> will get very 
>>> familiar with the fine print of the datasheet, especially 
>> if you try 
>>> to do unconventional stuff with it), but it is a solid performer.  
>>> Just don't try to power it up backwards.  Unlike most 
>> opamps, it will 
>>> self-destruct instantly (as would the SSM2164).
>>> 
>>> 
>>>> http://www.smallbearelec.com/servlet/Detail?no=737 - $3.50 
>> singles // 
>>>> comes down quickly from there in multiples..
>>>> 
>>>> On 15/05/2013 16:11, Terry Shultz wrote:
>>>>> Hi Damian,
>>>>> 
>>>>> Any cost idea on small volume usage?
>>>>> 
>>>>> Regards,
>>>>> 
>>>>> Terry
>>>>> 
>>>>> Sent from my iPad
>>>>> 
>>>>> On May 15, 2013, at 7:15 AM, "cheater00 ."
>>>> <cheater00 at gmail.com> wrote:
>>>>> 
>>>>>> Hi Terry,
>>>>>> people here really like the CoolAudio chips. The V2164 has
>>>> met with
>>>>>> great reception on the list and is a very good equivalent
>>>> to the SSM
>>>>>> 2164.
>>>>>> 
>>>>>> Cheers,
>>>>>> Damian
>>>>>> 
>>>>>> On Wed, May 15, 2013 at 2:39 PM, Nathanael King 
>>>>>> <nate at paperproductsmusic.com> wrote:
>>>>>>> Not only does THAT have the 2180 line, but they also have
>>>> an ssm2164
>>>>>>> available in 2 vcas (2162) in a surface mount package.
>>>>>>> 
>>>> 
>> http://www.thatcorp.com/2162_Dual_Pre-Trimmed_Blackmer_IC_Voltage-Co
>>>>>>> ntrolled_Amplifier.shtml
>>>>>>> 
>>>>>>> Nate
>>>>>>> 
>>>>>>> On Wed, May 15, 2013 at 8:33 AM, Terry Shultz
>>>> <thx1138 at earthlink.net> wrote:
>>>>>>>> Hi All,
>>>>>>>> 
>>>>>>>> I have finally used the last of my SSM2020 devices on my
>>>> boards and
>>>>>>>> it is time to re-design the Quad VCA and Universal
>>>> Active filter modules.
>>>>>>>> 
>>>>>>>> I was looking at the LM13600/LM13700 and THAT Corp. 
>> VCA devices.
>>>>>>>> 
>>>>>>>> Any thoughts on those devices vs. other methods of
>>>> building a Solid
>>>>>>>> VCA design?
>>>>>>>> 
>>>>>>>> I have not had to re-build these modules for over 25 
>> years, so I 
>>>>>>>> get to explore a whole new analog approach again.
>>>>>>>> 
>>>>>>>> 
>>>>>>>> I will not use the Grey Market SSM's if I can help it, but 
>>>>>>>> Rochester Electronics seem to have SSMSSM 2014/ SSM2018,
>>>> SSM2122 devices.
>>>>>>>> 
>>>>>>>> Any thoughts?
>>>>>>>> 
>>>>>>>> 
>>>>>>>> Terry Shultz
>>>>>>>> thx1138 at earthlink.net
>>>>>>>> 
>>>>>>>> 
>>>>>>>> 
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>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> --
>>>>>>> Nate King
>>>>>>> Paper Products Music
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>>>>> 
>>>> 
>>>> --
>>>> BugBrand LTD
>>>> UK company No. 07199808
>>>> VAT No. GB 988 2629 57
>>>> 1 Ninetree Hill
>>>> BRISTOL BS1 3SB
>>>> United Kingdom
>>>> www.bugbrand.co.uk
>>>> 
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