rivendu
Junior Member level 3
hi,
i am designing a flash adc and would like to know how to set the difference between vref at the top and the bottom of the resistor ladder. does it only depend on the icmr of the comparator? the goal is to get all comparators switching at the right time. thus, the comparator at the top should switch as fast as the comparator at the bottom of the array, when the input voltage exceeds its reference voltage.
another question is: is it ok to set the unit resistance value to 1kOhm in the 4-5 and the 8bit case at a supply voltage of 1V in the 65nm technology?
thanks in advance
i am designing a flash adc and would like to know how to set the difference between vref at the top and the bottom of the resistor ladder. does it only depend on the icmr of the comparator? the goal is to get all comparators switching at the right time. thus, the comparator at the top should switch as fast as the comparator at the bottom of the array, when the input voltage exceeds its reference voltage.
another question is: is it ok to set the unit resistance value to 1kOhm in the 4-5 and the 8bit case at a supply voltage of 1V in the 65nm technology?
thanks in advance
