ruby1212
Junior Member level 3
Hello all;
In pipeline ADCs where charge distribution dynamic comparators are used, the design of the different comparators is the same, they are only fed with different references to make them get exercised at different input voltage values.....When applying a ramp to the ADC each comparator exhibits a certain value of offset voltage (which is no problem caus digital correction takes care of it..), my question is: this value of offset voltage depends only on the actual comparator or on it's threshold too ? For example, if i make one of these comparators to get exercised at an input equal to V2 instead of it's initial thereshold V1...the offset that the comparator will exhibit when his threshold is changed to be V2 will be different from what he has exhibited when his threshold was V1 ?
Thnaks for your answers! and please ask me to rephrase if my question is not clear
In pipeline ADCs where charge distribution dynamic comparators are used, the design of the different comparators is the same, they are only fed with different references to make them get exercised at different input voltage values.....When applying a ramp to the ADC each comparator exhibits a certain value of offset voltage (which is no problem caus digital correction takes care of it..), my question is: this value of offset voltage depends only on the actual comparator or on it's threshold too ? For example, if i make one of these comparators to get exercised at an input equal to V2 instead of it's initial thereshold V1...the offset that the comparator will exhibit when his threshold is changed to be V2 will be different from what he has exhibited when his threshold was V1 ?
Thnaks for your answers! and please ask me to rephrase if my question is not clear