layout of the elliptic gm-C filter

[abcyin]

hi,all

after I finished the schematic of a elliptic Gm-C filter, what requirement should I take into account when I layout the filter, is there anyone who can give me some advice about that?

thx in advance!

 

[pfd001]

If the cutoff frequency of the filter is high, you should pay attention to the parasitic caps. symmtry is important for differential design. Matching is always important for analog design

 

[abcyin]

If the cutoff frequency of the filter is high, you should pay attention to the parasitic caps. symmtry is important for differential design. Matching is always important for analog design

thanks!
I do think that the cutoff frequency will be affected by the parasitic caps, but what I want to know is that is there some details which I should pay attention to, and how to floor plan so much Gm blocks, thx again.

And it could be better if you could provide some literature about the filter layout. I will appreciate it!

BR!

 

[fixrouter4400]

Could you show us your sample schematic then we can give you an idea on how to start you layout.Also what process tech are you going to use?

 

[songjunjian]

you can add the parasitic capacitor and resistor into the schematic ,and simulate it , you can do the sens analyse in the behavier model of matlab or schematic, then you can find which element is important and should pay attention.