analog_prodigy
Full Member level 2
Hi friends,
Please clarify my doubt
1. usually while designing analog blocks, we choose L (length) values 2-5 times the minimum lenght. Why?
As L increases, the output resistance increases. That leads to high gain (gm * ro). Is it the reason for that? Or any other fabrication issue?
2. But, for digital blocks, i observed using the minimum length instead of multiplied. How can we use a minimum length for digital blocks while using 2-5 times L for analog blocks?
Thank you
Please clarify my doubt
1. usually while designing analog blocks, we choose L (length) values 2-5 times the minimum lenght. Why?
As L increases, the output resistance increases. That leads to high gain (gm * ro). Is it the reason for that? Or any other fabrication issue?
2. But, for digital blocks, i observed using the minimum length instead of multiplied. How can we use a minimum length for digital blocks while using 2-5 times L for analog blocks?
Thank you