Fingerprint detection circuit, and capacitive fingerprint sensor and mobile terminal thereof
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United States of America Patent
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Feb 27, 2018
Grant Date -
Dec 8, 2016
app pub date -
Aug 22, 2016
filing date -
Sep 29, 2014
priority date (Note) -
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Abstract
The present disclosure discloses a fingerprint detection circuit, including a plurality of detection units arranged in an array and a summing unit. The detection units include a first detection unit and a second detection unit being respectively connected to the summing unit. The summing unit conducts 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.
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