LVDS Modelling using ADS

Can Tx_diff and Rx_diff in ADS be used to model a LVDS Transmission Line? And if yes, then is a 100 ohm resistor enough to be used as termination, should I add other components like capacitor? Normally, do the designer of the transmission line has the freedom to decide how the line is being terminated?

Hi,

LVDS transmission line and it′s termination:
You didn′t try to find an anwer by yourself. So let me help you:
http://lmgtfy.com/?q=lvds+termination

Klaus

Hi, Thanks for your response. As I know Differential Transmitter in ADS can only output something like [-0.3 0.3] V. I want it to ouput [1.05 1.35] V to be input to the coupled line. However, if i set vhigh as 1.35V and vlow as 1.05V, then I get v+ as [0.525 0.675] V and V- as [-0.525 -0.675]. What I mean here is I wish to have a dc offset voltgae at about 1.2V and add it to both V+ and V-. Is it possible for channelSim?

Apparently Tx_Diff source doesn't allow to specify a common mode voltage. Solution: refer to the internal Tx_Diff circuit given in the ADS doc and make your own driver with common mode voltage. Or use a different way to make an appropriate LVDS driver.

Thanks. I use single ended transmitter to output [-0.3 0.3]V into ballun4port and add common mode voltage of 1.2V. That seems to solve to problem.

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