關於RF(IIP3)的疑問

z753951

如題~我在維基百科查到關於iip3的一些知識 網址如下:

http://en.wikipedia.org/wiki/IIP3
+ e8 i2 ~8 K4 Y, H
# w$ g9 i1 b: ~' Y看到Theory那一部份~裡面有一段文字這樣敘述(第四條算式下面):
# [$ ]8 M9 Y9 L9 {# I# FThe output waveform contains the original waveform, cos(ωt), plus a new harmonic term, cos(3ωt), the third-order. The coefficient of the cos(ωt) harmonic has two terms, one that varies linearly with V and one that varies with the cube of V. In fact, the coefficient of cos(ωt) has nearly the same form as the transfer function, except for the factor on the cubic term.
請問為什麼cos(wt)係數中V的三次方項會跟原本的transfer function不同?
這問題困擾我很久了~希望了解原理的高手能夠指點一下~小弟我很吹毛求疵的@@
感謝各位!

yoyo20701

嗯~~~謝大大的解答~~~小弟知道囉~~~謝謝喔~~~~大大謝謝你

z753951

感謝ERIC兄的回答 我會趕緊去我們學校的圖書館借這本書^^

ericlee0825

建議你可參考Razavi的RF Microelectronics這本書第二章，裡面有很詳細的解說~!