[sdiy] need an op-amp that can clip without phase reversal
jason at redfish.net
Thu Aug 14 09:43:35 CEST 2008
i'm late to this thread, a newbie, and drunk into the bargain, but
for railsafe operation, the LT1013 seems to be the opamp of choice
> > I did try the the TL072 which supposedly does not latch up...
>well it did, and a whole lot.
>The TL072 doesn't latch up. However, if the circuit uses negative
>feedback it may appear to do so. Since the TL072 undergoes phase
>reversal when the input gets too close to the negative rail,
>negative feedback becomes positive feedback and the whole circuit
>slams to the rail.
>For example, an SVF built with the TL072 as voltage followers can
>show this effect on power up.
>If you use two inverting gain stages you will avoid this problem.
>But this may not an option for you. Reducing the input voltage range
>is usually the best in this case.
>Synth-diy mailing list
>Synth-diy at synth-diy.org
More information about the Synth-diy