[sdiy] Thanks for public schematics (was Re: Discrete OTA)

[Neil Johnson]

Sam,

Thanks for the link.  I have added it to my free CAD page for
reference, and also a link to your page as examples of what it can do:

http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=7

Cheers,
Neil

On 17 April 2014 16:31,  <houshu at muj.biglobe.ne.jp> wrote:
> Hi Andrew,
>
> I'm happy to know that you like my schematics.
> I'm looking forward to see your designs.
>
> CAD software I'm using is Suigyodo BSch3V:
>
>   http://www.suigyodo.com/online/e/index.htm
>
> I don't know English info is sufficient for you.
> Fortunately, there is full set of source code.
>
> Sam HOSHUYAMA
> Saitama, JAPAN
>
> ----- Original Message -----
> From: "Andrew Simper" <andy at cytomic.com>
> To: houshu at muj.biglobe.ne.jp
> Cc: "synthdiy diy" <synth-diy at dropmix.xs4all.nl>, "Ian Fritz" <ijfritz at comcast.net>
> Sent: Tuesday, April 8, 2014 11:21:38
> Subject: Thanks for public schematics (was Re: [sdiy] Discrete OTA)
>
> Hi Sam,
>
> Thank you very much for making your collection of schematics public
> http://www5b.biglobe.ne.jp/~houshu/synth/ , they have been very
> helpful for me, especially the re-drawing of the OSCar filter and your
> ideas on making a high pass transistor ladder. I am interested in
> designing new circuits and will make my designs public also. Can you
> please let me know the CAD program you use for your drawings?
>
> -- Andy
>
>
> On 8 April 2014 08:45,  <houshu at muj.biglobe.ne.jp> wrote:
>> Hello List,
>>
>> I agree that Roman is the inventor as for the SSM2164 based schematic.
>>
>> Actually, the same principle was invented by Barrie Gilbert in 1983.
>>
>>   Temperature compensated logarithmic circuit US 4604532 A
>>    http://www.google.com/patents/US4604532?hl=ja&dq=4,454,433
>>
>> I think we should proud our re-invention of the same idea by Barrie.
>>
>> Best,
>>
>> Sam HOSHUYAMA
>> Saitama, JAPAN
>>
>> ----- Original Message -----
>> From: "Ian Fritz" <ijfritz at comcast.net>
>> To: "Phil Macphail" <phil.macphail at liivatera.com>, "Roman Sowa" <modular at go2.pl>
>> Cc: synth-diy at dropmix.xs4all.nl
>> Sent: Tuesday, April 8, 2014 03:07:33
>> Subject: Re: [sdiy] Discrete OTA
>>
>> At 03:16 AM 4/7/2014, Phil Macphail wrote:
>>>If I has incorrectly attributed the design to the wrong person then I
>>>apologise, but after a bit of looking around Google turns-up this on
>>>Neil's website -
>>>http://www.milton.arachsys.com/nj71/misc/0drift.html
>>>
>>>which is dated 30th August, and the Osamu website has this page -
>>>http://userdisk.webry.biglobe.ne.jp/000/024/65/N000/000/000/125151002153016326829_Exp_SSM0908.PNG
>>>Claiming to have breadboarded the design on 28th August.
>>>
>>>So without further investigation it looks like great minds really do think
>>>alike!
>>
>> Not quite following you here.  The dates are ten years apart.  Clearly
>> Romans invention!
>>
>> Ian
>>
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