SAR ADC WITH THRESHOLD TRIGGER FUNCTIONALITY FOR REDUCED POWER CONSUMPTION

摘要

An ADC method and system implement a comparison stage of SAR ADC directly in the analog domain rather than the digital domain, without resolving the output word D_out. This means that the number of comparisons, and thus the numbers of required periods of CK, equals number of threshold values instead of equaling the number of bits in the resolved output word. In this way, power is saved in the analog domain as well as in the digital domain.