[sdiy] low input bias current opamps

[Ian Fritz]

I thought it was a good question.

Ian

> On Aug 15, 2018, at 1:25 AM, David G Dixon <dixon at mail.ubc.ca> wrote:
> 
> Sorry, but I have several more responses to this highly impertinent
> question:
> 
> 1) Why does it matter to you?
> 2) Who gives a shit?
> 3) What business is it of yours?
> 4) The chips I want are through-hole, but Intellijel only builds in
> surface-mount format, so do the math.
> 
> I'm just asking if any of you know of a decent quad with low input bias that
> isn't LF444, and isn't one of those damn low-power p's of s.
> 
> If you know the answer, I'd love to hear about it.  If you want a free Doc
> Sketchy ASR board for your trouble, I'm happy to make one for you.
> 
> Otherwise, I'd respectfully ask you to mind your own damn business.
> 
> In any case, the answer is yes.  I'm making all sorts of money.  $75 from
> some dude in Oregon for a handmade, stuffed and tested ASR board.  So that
> works out to about half of the minimum wage for the 3 or 4 hours it'll take
> me, after my expenses.  Should I donate it to the list?
> 
> 
> 
> 
>> -----Original Message-----
>> From: p. hendricks [mailto:ph at comcast.net] 
>> Sent: Tuesday, August 14, 2018 10:32 PM
>> To: David G Dixon; 'SDIY List'
>> Subject: Re: [sdiy] low input bias current opamps
>> 
>> Will this be used in a commercial product?
>> You may want to clarify the use further, so it doesn't sound 
>> like an unpaid consulting job. Are you getting paid for this? 
>> If so, what is the compensation for this?
>> 
>>> On 8/14/18 8:43 PM, David G Dixon wrote:
>>> Hey Team,
>>> 
>>> I'm looking for opamps with the following properties:
>>> 
>>> 1) Through-hole
>>> 2) Quad opamp
>>> 3) 14-DIP package
>>> 4) High power range (+/-18V, say)
>>> 5) Low input bias current (10 pA or less typical)
>>> 6) Pin-compatible with TL074, etc.
>>> 7) Not LF444 (cuz they all seem to be defective)
>>> 
>>> So, basically, I'm looking for a suitable alternative for LF444.
>>> 
>>> So, here are my questions:
>>> 
>>> A) Do you know of such a thing
>>> B) How does one go about finding such a thing, generally?
>>> 
>>> Thanks in advance!
>>> Dave (Floating VCA) Dixon
>>> 
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at synth-diy.org
>>> http://synth-diy.org/mailman/listinfo/synth-diy
>> 
>> 
> 
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