manissri
Full Member level 5
problem with bias cucuit
hi all
i am desinging the folded cascode fully differential cascode opamp with gain boost ..
for which i am using the tail current of 3.5 ma in tail of opamp ( which is cascoded)
so i want to desing the bias circuit for this tail circuit .i am using the cascode current for the bias of this tail ..
so i want to know that how much current i will flow in my bias curcuit so that it will mirror the tail ( 3.5 ma).
if is use the 3.5 ma in my bias it will be well and good but due to this my power diss will increse.so how much i flow the current in bias circuit so that it can mirror the 3.5ma of tail of opamp..
some literature tell that u can flow t the 1/5 of tail current in bias .is it true ..
plz answer..
regards..
manish
hi all
i am desinging the folded cascode fully differential cascode opamp with gain boost ..
for which i am using the tail current of 3.5 ma in tail of opamp ( which is cascoded)
so i want to desing the bias circuit for this tail circuit .i am using the cascode current for the bias of this tail ..
so i want to know that how much current i will flow in my bias curcuit so that it will mirror the tail ( 3.5 ma).
if is use the 3.5 ma in my bias it will be well and good but due to this my power diss will increse.so how much i flow the current in bias circuit so that it can mirror the 3.5ma of tail of opamp..
some literature tell that u can flow t the 1/5 of tail current in bias .is it true ..
plz answer..
regards..
manish