公开(公告)号：US10146985B2

公开(公告)日：2018-12-04

申请号：US15438463

申请日：2017-02-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dae Young Chung ,  Jae Jin Park ,  Hee Chang Hwang

IPC: G06K9/00

Abstract: A sensing read-out circuit includes an amplifier circuit that converts a charge output from a sensing line of a sensor into a first voltage, another amplifier circuit that converts a charge output from another sensing line into a second voltage, another amplifier circuit that generates a first amplified voltage by amplifying a difference between the first voltage and the second voltage, an analog-to-digital converter that converts the first amplified voltage into a digital signal, a first mixer that generates a second mixed signal by mixing the first digital signal and an in-phase clock signal, a second mixer that generates a second mixed signal by mixing the first digital signal and a quadrature-phase clock signal, a first filter that generates an in-phase signal by performing low-pass filtering on the first mixed signal, and a second filter that generates a quadrature-phase signal by performing low-pass filtering on the second mixed signal.

公开(公告)号：US20180039809A1

公开(公告)日：2018-02-08

申请号：US15438463

申请日：2017-02-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： DAE YOUNG CHUNG ,  Jae Jin Park ,  Hee Chang Hwang

IPC: G06K9/00 ,  H03F3/70 ,  H03F3/68

CPC classification number: G06K9/0002 ,  G06K9/00013 ,  G06K9/00046

Abstract: A sensing read-out circuit includes an amplifier circuit that converts a charge output from a sensing line of a sensor into a first voltage, another amplifier circuit that converts a charge output from another sensing line into a second voltage, another amplifier circuit that generates a first amplified voltage by amplifying a difference between the first voltage and the second voltage, an analog-to-digital converter that converts the first amplified voltage into a digital signal, a first mixer that generates a second mixed signal by mixing the first digital signal and an in-phase clock signal, a second mixer that generates a second mixed signal by mixing the first digital signal and a quadrature-phase clock signal, a first filter that generates an in-phase signal by performing low-pass filtering on the first mixed signal, and a second filter that generates a quadrature-phase signal by performing low-pass filtering on the second mixed signal.

公开(公告)号：US10726228B2

公开(公告)日：2020-07-28

申请号：US15648320

申请日：2017-07-12

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hee Chang Hwang ,  Jae Jin Park ,  Min Chul Lee ,  Seung Hoon Lee ,  Dae Young Chung

IPC: G06K9/00 ,  H01L23/528

Abstract: A semiconductor device comprising a fingerprint sensor configured to generate first-direction sensing data and second-direction sensing data by sensing a fingerprint image in a first direction and a second direction, respectively, which is perpendicular to the first direction; a differential sensing circuit configured to generate first-direction first differential data and second-direction first differential data by performing a differential operation on the first-direction sensing data and the second-direction sensing data, respectively; and a fingerprint processing circuit configured to generate first-direction second differential data and second-direction second differential data by performing a differential operation on the first-direction first differential data and the second-direction first differential data, respectively, and generate fingerprint data by adding the first-direction second differential data and the second-direction second differential data.