Junus2012
Advanced Member level 5
Dear friends,
In my layout design I can change the aspect ratio (W/L) for the unit cell transistor in the matched MOS array. I can decrease it by increasing the array order or by increasing the number of fingers in the transistors.
My first question,
1. why I always see people talking about reducing the aspect ratio to make it square for the unit cell ? I am using channel length of 1 um.
2. The second question what is the lowest practical limit of the aspect ratio in the matched array, is it possible to have aspect ration less than one (like 2um / 4 um) ?
3. Third question is inverse to the second one, what is the maximum practical value of the aspect ratio ?
4. The last but not the lease, what is better, reducing the aspect ratio by increasing the array order or by increasing the number of fingers ? of course mixing of both is possible.
Sorry to ask multiple question but I am trying to avoid similar topic post
Thank you very much
In my layout design I can change the aspect ratio (W/L) for the unit cell transistor in the matched MOS array. I can decrease it by increasing the array order or by increasing the number of fingers in the transistors.
My first question,
1. why I always see people talking about reducing the aspect ratio to make it square for the unit cell ? I am using channel length of 1 um.
2. The second question what is the lowest practical limit of the aspect ratio in the matched array, is it possible to have aspect ration less than one (like 2um / 4 um) ?
3. Third question is inverse to the second one, what is the maximum practical value of the aspect ratio ?
4. The last but not the lease, what is better, reducing the aspect ratio by increasing the array order or by increasing the number of fingers ? of course mixing of both is possible.
Sorry to ask multiple question but I am trying to avoid similar topic post
Thank you very much