[SI-LIST] Re: Interconnect Simulations-V2
- From: "Keskinen, Kai" <KaiKeskinen@xxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Tue, 20 May 2003 12:23:56 -0400
If you work out the amplitude of the harmonics of an infinitely repeating
trapesoidal waveform with equal rising and falling edges, you find that the
harmonics on a log-log plot fall at 20dB per decade until you reach
1/(pi*Tr) ~ 0.318/Tr . After that knee frequency, they fall at 40dB per
decade. Most of the significant harmonics are present to the knee frequency.
Clayton Paul's book on EMC has both measurements and the derivation for
those who last did a fourier analysis in undergrad. Does anyone know where
the 0.35 number can be derived from?
Cheers,
Kai Keskinen
Signal Integrity Advisor
Solectron Technical Center
21 Richardson Side Road,
Kanata, ON K2K 2C1
<mailto:kaikeskinen@xxxxxxxxxxxxx>
<http://www.solectron.com/>
"This message may contain information proprietary to Solectron so any
unauthorized disclosure, copying or distribution of its contents is strictly
prohibited."
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