[sdiy] Op-amps CA3140 v. TL074

[Harry Bissell]

The 3140 has much lower input bias current, which could be a factor in
really high impedance circuits (S/H for example) but for S-DIY use the
TL07x series works for most uses.

I have not used the 3140 in a long time...

H^) harry

----- Original Message -----
From: Tim Daugard <daugard at cox.net>
To: synth-diy <synth-diy at dropmix.xs4all.nl>
Sent: Thu, 29 Jul 2010 15:58:15 -0400 (EDT)
Subject: Re: [sdiy] Op-amps CA3140 v. TL074

Has any one used the CA3140 or more, compared it to the TL074? The data 
sheet says the CA3140 has a MOSFET input. Is that input anything special?

. . . and yes I know the bandwidth is better on the CA3140, but for use 
under 1 Mhz, the band with shouldn't matter.

Tim Daugard
AG4GZ 30.4078N 86.6227W Alt: 12 feet above MSL
http://members.cox.net/synthfred/h_toctop.htm (Fred's online edition)


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-- 
Harry Bissell & Nora Abdullah 4eva