PSpice generates gray hair, not correct answers
Reading into the authors explanation of the transconductance value (Kn) it was discovered that this value is not the same transconductance value PSpice uses (KP). The author wastes a paragraph of ink explaining that the value Kn used in the book is commonly known as the transconduction parameter, however the reader should refer to the value as the conduction parameter. The author defines the conduction parameter as:

1: Kn = (W*un*Cox)/(2L) and Cox = eox/tox

THEN at the bottom of the page it is written that "we can rewrite the conduction parameter in the form":

2: Kn = (k'n/2)(W/L)

The following page defines k'n as the process conduction parameter:

3: k'n = un*Cox

By default Pspice defaults the width and length to .1uM. Therefor equation two becomes:

4: Kn = k'n/2

Based on the evidence that the PSpice output was off by a factor of 2, k'n represents the value PSpice considers to be the transconductance parameter. The author of the book considers this value to be the process conduction parameter. This result was confirmed with other examples from the book.

I think I am more confused now than before. How do I know what value to use when I look at a spec sheet!?!?