What is and how is perametrized cell used ?

[p.sivakumar]

perametrized cell

Hi
What is perametrized cell ? can any one explain what is the use and where we can use these cells in analog layouts ?

Thanks
Siva

 

[elbadry]

Re: perametrized cell

A paramaterized Cell is a layout cell in which you can change the layout ( change the sizing ) by changing a parameter ( a variable ).

Typically, a design Kit will contain PCELLs of all transistors and passive elements. So, you do not need to draw your own transistor. You just insert a pcell with the device size and all you need to do is perform placement, matching and routing

 

[p_shinde]

Re: perametrized cell

now if i start working on 90nm tech am i sippose to get the pcells of this tech????


as of now i am working on 180 nm tech but the pcells r not of 180nm tech thats y....


also one might be able to draw pcells of any tech he/she wants..


pls comment on this...


thanks,
Prasad

 

[road_0506]

Re: perametrized cell

you can get the pcells from the pdk (process design kit) of your process.
if you draw the cells manually, it is no longer p cell, but s-cell (standard cell).