Circuit desing
Thanks for your reply, I know that sizing of transistors depends on process and several things like offset, speed, resolution. But only in one book I saw some formula for comparator designing that depends on spped, resolution …(in: CMOS Analog Circuit Design, Phillip E.Allen), but unfortunately only Two stage Comparators have been described in this book(with formulas that depend on process).
I want a comprator with this spec:
Gain=1800, Resolution:1mV, Propagation Delay<0.4nS, Vdd=1.8V, ICMR=0-1V, Tech:0.18um
really I mixed up, how can I use of this spec for comparator design?.