I'm using ako: with a trailing (field) separator, as written in "General Form" in MicroSim's PSpice reference manual (as far as I remember, MicroSim introduced ako:).
But in the corresponding example, MicroSim omitted the space.
I hope LTspice will continue to accept ako: with and without trailing separators.
Excerpt from MicroSim PSpice A/D 7 Reference Manual:
Commands:
...
.MODEL (Model)
...
General Form:
.MODEL <model name> [AKO: <reference model name>]
+ ...
...
Example:
...
.MODEL QDR2 AKO:QDRIV NPN (BF=50 IKF=50m)
(from Berkeley SPICE3: Field separators are blanks, comma, equal (¡¯=¡¯) sign, left or right parenthesis; extra separators are ignored)
Bernhard
