I'm designing a 6-bits flash ADC. The comparator that I'm using does not have "hysteresis" feature and the comparator supply are coming directly from VDD without a voltage regulator. I'm worry that noise coming from power supply will cause unwanted switching of the comparators. Should I be worry about this? or how should I ensure that the unwanted comparator switching will never happen.
The comparator that I'm using is the typical two stage opamp configuration with pmos as input. Why do you think that supply noise won't cause unwanted switching error?
The comparator that I'm using is the typical two stage opamp configuration with pmos as input. Why do you think that supply noise won't cause unwanted switching error?
FYI, my system main signal path switches at 1.25Gbps, while my comparator only need to work at maximum 1KHz. I'm trying to reduce the bandwith of my comparator further down as currently it has a bandwith of 100KHz. Will this help? What should be the target bandwith?
Just for clarification, attached is the comparator that I'm using without the RC compensation network.