Re: do I need to use large transistors to decrease the offse
Of course if you can make the WL larger the matching will be better. However there is always trade-off with speed, power, etc of the comparator. Since you have already used offset storage in comparator design, you should run a simulation to test how the effectiveness of the offset cancellation mechanism, and corresponding to scale the WL to just enough for you specs. Of course, WL larger is better, but is it neccessary?