公开(公告)号：US09542587B2

公开(公告)日：2017-01-10

申请号：US14443342

申请日：2014-04-29

Applicant: SILEAD, INC.

Inventor： Taiyi Cheng ,  Xianggui Zhao

IPC: G01R27/08 ,  G06K9/00 ,  H01L27/092 ,  H01L27/06 ,  G01N27/22 ,  H03K19/003 ,  G11C29/00

CPC classification number: G06K9/0002 ,  G01N27/228 ,  G11C29/785 ,  H01L27/0629 ,  H01L27/092 ,  H01L27/0922 ,  H01L29/1033 ,  H03K17/223 ,  H03K19/00361 ,  H03K19/00392

Abstract: The present invention relates to a chip design and discloses a fingerprint information detection circuit. The invention includes a reset unit, a feedback unit, an amplification unit and a source follower unit; the reset unit is connected to the feedback unit and amplification unit, while the feedback unit is connected to the amplification unit, and the amplification unit is connected to the source follower unit; when the reset transistor built-into the reset unit is on, it stores an electric charge, and resets the feedback unit; when the reset transistor is off, the stored electric charge is injected into the feedback unit and amplification unit; the feedback unit receives the electric charge, and outputs the second voltage signal generated when it detects fingerprints to the source follower unit; the amplification unit amplifies the received signal and outputs it to the source follower unit; the source follower unit receives the signal, performs voltage level shifting before outputting the first voltage signal that carries the detected fingerprint information. The present invention enables the circuit to use a reduced chip area, hence, saving the cost of the chip.

Abstract translation: 本发明涉及一种芯片设计，并公开了一种指纹信息检测电路。 本发明包括复位单元，反馈单元，放大单元和源极跟随单元; 复位单元连接到反馈单元和放大单元，而反馈单元连接到放大单元，并且放大单元连接到源极跟随单元; 当内置复位单元的复位晶体管导通时，存储电荷，并复位反馈单元; 当复位晶体管截止时，将存储的电荷注入反馈单元和放大单元; 反馈单元接收电荷，并将其检测指纹时产生的第二电压信号输出到源极跟随单元; 放大单元放大接收信号并将其输出到源极跟随器单元; 源极跟随器单元接收信号，在输出携带检测到的指纹信息的第一电压信号之前执行电压电平移位。 本发明使得电路能够使用减小的芯片面积，因此节省了芯片的成本。

公开(公告)号：US09922230B2

公开(公告)日：2018-03-20

申请号：US15384041

申请日：2016-12-19

Applicant: SILEAD, INC.

Inventor： Taiyi Cheng ,  Xianggui Zhao

IPC: G06K9/00 ,  G01N27/22 ,  H01L27/06 ,  H01L27/092 ,  H03K17/22 ,  G11C29/00 ,  H03K19/003 ,  H01L29/10

CPC classification number: G06K9/0002 ,  G01N27/228 ,  G11C29/785 ,  H01L27/0629 ,  H01L27/092 ,  H01L27/0922 ,  H01L29/1033 ,  H03K17/223 ,  H03K19/00361 ,  H03K19/00392

Abstract: A fingerprint information detection circuit comprises an amplification unit, a source follower unit, a reset unit, and a feedback unit. The amplification unit is coupled to the source follower unit. The reset unit is coupled to both the feedback unit and the amplification unit. The feedback unit and the amplification unit are coupled. The reset unit includes a first transistor and a reset transistor, wherein source and drain electrodes of the first transistor are coupled, wherein one of source and drain electrodes of the reset transistor is coupled to the source and drain electrodes of the first transistor.