Cyclone V Emulated LVDS Signal Voltages - Cyclone V Emulated LVDS Signal Voltages Hi, I am using the two 121R resistors followed by 169R in parallel, with 100R parallel termination. I can't find any information on what signal amplitude I would see across the 169R resistor. I need the information for derating purposes. Thanks in advance. Ian Replies: Re: Cyclone V Emulated LVDS Signal Voltages It did, thanks guys. Replies: Re: Cyclone V Emulated LVDS Signal Voltages Kindly confirm whether the suggested steps have addressed your concern? Replies: Re: Cyclone V Emulated LVDS Signal Voltages Hi Ian, for an exact calculation, you can derive output characteristic of LVDS_E3R IO standard from IBIS files. In practice, it's very easy. Just assume full VCCIO of 2.5V as differential output voltage. Respectively current through 121 ohm resistors is 8.2 mA, voltage across 169 ohm resistor and 100 ohm termination about 0.52 V. Regards Frank