"Jim Thompson" wrote in
message ...
An XOR is a convenient structure to allow a control signal to invert
or non-invert another signal.

Trouble is (as classically done) inverting has 3 stage delays, while
non-inverting has only 2.

Anyone know of a configuration that has symmetric delays?

Thanks!

(I'm rolling my own at the device level so anything goes :-)

View in fixed-pitch:

__
A ---o-------------| \
| | )o-.
| .--|__/ |
| | |
| __ | | __
'--| \ | '--| \
| )o--o | )o---A xor B
.--|__/ | .--|__/
| | |
| | __ |
| '--| \ |
| | )o-'
B ---o-------------|__/