Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!zaphod.mps.ohio-state.edu!swrinde!emory!athena.cs.uga.edu!mcovingt
From: mcovingt@athena.cs.uga.edu (Michael A. Covington)
Newsgroups: sci.electronics
Subject: Re: Help with op-amp follower
Summary: What kind of op-amp?
Message-ID: <1991Jun24.041758.5503@athena.cs.uga.edu>
Date: 24 Jun 91 04:17:58 GMT
References: <1991Jun23.230350.27027@nntp-server.caltech.edu>
Organization: University of Georgia, Athens
Lines: 15

Is the LF356 by any chance a high-frequency op-amp?

Some op-amps are not stable at *low* gain, because their compensating
capacitors are deliberately made a little too small, relying on
negative feedback (higher at high gain) to complete the stabilizing
system. 

Also, are the power supply leads to the op-amp (both + and -) bypassed
to ground with 0.05-uF capacitors?  If not, they should be.

-- 
-------------------------------------------------------
Michael A. Covington | Artificial Intelligence Programs
The University of Georgia  |  Athens, GA 30602   U.S.A.
-------------------------------------------------------