yeah i found out about the xnor thing a while ago, that's how there's a 4-wide 4-tick one in existance.
and yeah, the biggest problem in making it 3 tick is making a 1 tick XNOR gate that outputs full signal strength.
also don, if you look back a few pages i have a logisim circuit modelling how CCA behaves, with an array of transistors, or gates, and weighted wires to represent the signal strength being handled by the comparators. It looks very similar to CLA
and yeah, the biggest problem in making it 3 tick is making a 1 tick XNOR gate that outputs full signal strength.
also don, if you look back a few pages i have a logisim circuit modelling how CCA behaves, with an array of transistors, or gates, and weighted wires to represent the signal strength being handled by the comparators. It looks very similar to CLA