[sdiy] mosfet/cmos opamp

[Harry Bissell]

Hi Ian (et al)

Do you find the CA3140 to be much better than the TL07x (or 08x) series
in a sample hold application. I have used both but have not noticed that
much difference.

Of course I do have a stock of them as well :^)

H^) harry





----- Original Message -----
From: Ian Fritz <ijfritz at comcast.net>
To: dan snazelle <subjectivity at hotmail.com>, synth-diy DIY <synth-diy at dropmix.xs4all.nl>
Sent: Thu, 28 Oct 2010 04:48:42 -0400 (EDT)
Subject: Re: [sdiy] mosfet/cmos opamp

At 09:20 PM 10/27/2010, dan snazelle wrote:
>i have plenty of 4069's/4049's but i was reading some articles saying that 
>mosfet opamps offer the advantages of mosfet with a regular opamp design.
>
>sounded great till i realized how few and far between they are

Yes, they are unique.

Intersil lists the CA3140 as in production.  Jameco has them for $1.  Their 
high input impedance is impossible to beat without paying a lot more.  I 
use them in my S/H module  -- at the time I developed it they were $.50 or 
so.  I recommend folks stock up on them now, while the price is reasonable.

Ian 

_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy

-- 
Harry Bissell & Nora Abdullah 4eva