how to set the W/L ratio for wide swing current mirror using pmos

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muhaw845

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i have implemanted the wide swing current mirror using pmos as shown in the fig attached .. the problem i a m facing is to set the W/L of the transistors ..
if some one know how to set then let me know!

 

Depends on your accuracy requirement. Here's my suggestion:

I'd start with L ≈ 5Lmin , e.g. L=1µm for a 180nm process.

Then - if you have no area restriction - use X = n²(n+1)² = (n(n+1))² , e.g. X=36 for n=2. Then you get
Code: 
M1, M2: W/L =  9/1
M3, M4: W/L = 36/1
M5:     W/L =  4/1
If you have to save real estate, use X = (n+1)²
 
thanks for your kind suggestion erikl;868403
i have implemented this current mirror in 65nm technology . can i use the same procedure for the sizing of current mirror in 65nm
 

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