[sdiy] need an op-amp that can clip without phase reversal

[Oakley Sound]

 > 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.

Tony

www.oakleysound.com