how to design fast switch using nmos

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KGxiaoyun

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I'm using nmos as a switch shown in fig. 1.
**broken link removed**
fig. 1
The clk is 10 GHz and data is 40GHz. However, the output is not 10GHz and suffers from great distortion(fig. 2). I tried to change the W/L, thinking maybe decreasing the capacitance will help, but it turned out not being helpful. Can anyone help me with that? Thanks!**broken link removed**
fig. 2
 

dear KGxiaoyun, not able to see the attachments pls repost the thread
 

please attach the images
 

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