I am designing a board with 50 and 75 ohm tracks on the same layer.My board receives SDI video via RG179 coax. The board has an SMA connector that receives the said input. The track is 75Ω track.
This is given to an LMH0344 chip that converts it into differential pair. The said chip is an adaptive filter chip which accepts either differential pair or 50Ω signal. So I am using an impedance matching pad - Link.
The differential signal is sent to an LMH0346 reclocker chip. The output of which is sent to an LMH0307 chip. The output is split RG179 video which means the 2 signals are 75Ω.
Now, the same layer has 75,50 and differential 100Ω. I am using a 4 layer stack-up Top->Gnd layer->Vcc layer->Bottom layer. Any tips in layout and routing of these signals ?