Re: Operational Amplifier Design

From: Tony Williams (tonyw_at_ledelec.demon.co.uk)
Date: 11/09/04 

Date: Tue, 09 Nov 2004 07:33:28 +0000 (GMT)

In article <6d3vo0pr4nd4ju27tlov1g4riitlf9ge6f@4ax.com>,

> The biggest problem was brand variability... Motorola's copy had
> such severe cross-over distortion as to make the part unusable
> for active filters... which is why I put the Motorola LM324 on
> the GenRad (OmniComp) do-not-purchase list.

 Plus a tendency for a little burst of hf oscillation
 from the output transistors at swapover. It was best
 with the LM324 to think of it as delivering positive
 output current only, with the negative current being
 supplied by an external pulldown. 

-- 
Tony Williams.