- SUCCESSIVE-APPROXIMATION REGISTER CAPACITANCE-TO-DIGITAL CONVERTER AND OPERATION METHOD THEREOF

摘要

A sequential comparative capacitance-digital converter according to an embodiment of the present application sequentially charges a capacitive sensor, the capacitive sensor, and performs a first digital conversion operation on the amount of charge sampled in the first charging cycle - a comparator and a loop filter for filtering the remaining charges in the capacitive sensor and outputting a residual charge, wherein the sequential-comparison converter performs a second digital conversion operation on the sum of the charged electric charge and the remaining electric charge. After the first charging cycle, each charging cycle is performed.