FINGERPRINT DETECTION CIRCUIT AND CAPACITIVE FINGERPRINT SENSOR THEREOF, AND MOBILE TERMINAL

摘要

The present invention discloses a fingerprint detection circuit, including a plurality of detection units arranged in an array, and further including a summing unit; wherein the detection units include a first detection unit and a second detection unit, the first detection unit and the second detection unit being respectively connected to the summing unit, the summing unit conducting a summing operation for an output signal of each second detection unit and an output signal of the first detection unit to cancel a base signal in the output signal of each second detection unit to acquire a useful signal including fingerprint information.