On page 7, author derived a equivalent model for linear oscillator.

There, he assumed something during the derivitation, I posted the page and that assupmtion on the picture. Hope you guys also read that book can help.

Also, on page  57, when author is deriving LC-differential pair noise, again, he assumed it when deriving equation (49).

Thanks,
neoflash

The attachment must be one of the following types: jpg jpeg gif png zip pdf tgz gz tar

-Ken