LVDS frequency and impedence

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zionico90

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Hi,

I should simulate a Twisted pair using low voltage differential signal. I know this parameters for the signal:

Trise=tfall= 1.2 ns
Working at 200 mb/s

Which is the frequency in Mhz?25MHz?
 

I assume you mean 200 Mega-bits-per-second. That's 200MHz; I don't know how you got 25MHz. If you want to know the bandwidth of your edges, that's :

F=0.35/tr==>292Mhz.
 

Just a quibble. A bit rate of 200 Mbits per second has a fundamental frequency of 100 MHz. A string of alternating 1-0-1-0... at 200 MBits per second would look like a 100 MHz signal with harmonics defined by the rise and fall times.
 

It Is particular signal in which the clock data is 01001101001
 

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