SV: Re: [sdiy] Aries expoconv, Terry Mikulic,Terry Michael.

[harry bissell]

karl dalen wrote:
>> The Aries expo is like the one on the
>> Arptech site for the SVF filter (forget the
>> number)
>>     
> You meant the 4023,  dual current sourcing with balance?
> Does AR 317  (VCO) have the same expo as the AR 314 (SVF)?
>   
AFAIK it does... the second current source is used for the sawtooth... 
which is a second
cap driven from the expo and sync'd to the triangle

Pretty clever design imho

H^) harry
> http://www.till.com/arptech/modmain.htm
>
> KD
>  
>   
>> The expo on the Moog ladder is essentially the same
>> but reverse current direction
>>
>> H^) harry
>>
>> --- karl dalen <dalenkarl at yahoo.se> wrote:
>>
>>     
>>> Anyone who have a picture of  Terry Mikulic's
>>> NPN-PNP
>>> circuit as published in Electronotes.#37 page 2? 
>>>
>>> Is it similar to JHs expo?
>>>
>>>       
>> http://home.debitel.net/user/jhaible/jh_expo_source_sink.gif
>>     
>>> KD
>>>
>>>       
>>     
>
>
>
>