pianomania
Member level 5
about delta sigma cic filter
it consists of integrator , decimator and differentiator.
lots of thesis discuss the mininmun word length for preventing overflow.
and it says that it is the same as the average window filter in frequency domain.
but if we disuss it in transient domain?
since every integrator in each stage will overflow
because each integrator is an accumulator , it will accumulate the past result from "t=0" , it means
it will rapidly overflow anyway ..except the wordlength is infinite.
i don't know if my concept is right or wrong ,
since if it will overflow in the first stage , it will saturate on the next stage and faster than first stage .. the cic will behave wrong.
it consists of integrator , decimator and differentiator.
lots of thesis discuss the mininmun word length for preventing overflow.
and it says that it is the same as the average window filter in frequency domain.
but if we disuss it in transient domain?
since every integrator in each stage will overflow
because each integrator is an accumulator , it will accumulate the past result from "t=0" , it means
it will rapidly overflow anyway ..except the wordlength is infinite.
i don't know if my concept is right or wrong ,
since if it will overflow in the first stage , it will saturate on the next stage and faster than first stage .. the cic will behave wrong.