公开(公告)号：US20240135131A1

公开(公告)日：2024-04-25

申请号：US18396071

申请日：2023-12-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Eunsang Jang ,  Junho Kim ,  Inhyuk Kim

IPC: G06K19/07 ,  G06K19/077 ,  H02M3/335

CPC classification number: G06K19/0718 ,  G06K19/0715 ,  G06K19/0723 ,  G06K19/077 ,  H02M3/33507 ,  H02M3/33584

Abstract: An internal voltage generation circuit of a smart card to perform fingerprint authentication and a smart card includes a first contact switch, a second contact switch, a switched capacitor converter and a bidirectional switched capacitor converter. The first contact switch selectively switches a contact voltage to a first node based on a first switching enable signal, in a contact mode. The second contact switch selectively switches the contact voltage to a second node based on a second switching enable signal, in the contact mode. The bidirectional switched capacitor converter steps down a first driving voltage of the first node to provide a second voltage to the second node in the contactless mode and either steps down the first driving voltage or boosts a second driving voltage of the second node based on a level of the contact voltage to provide a boosted voltage to the first node in the contact mode.

公开(公告)号：US11893435B2

公开(公告)日：2024-02-06

申请号：US17232298

申请日：2021-04-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Eunsang Jang ,  Junho Kim ,  Inhyuk Kim

IPC: G05B19/00 ,  G05B23/00 ,  G06F7/00 ,  G06F7/04 ,  G06T1/00 ,  G06T7/00 ,  G08B29/00 ,  G08C19/00 ,  H04B1/00 ,  H04B3/00 ,  H04Q1/00 ,  H04Q9/00 ,  G06K19/07 ,  G06K19/077 ,  H02M3/335

CPC classification number: G06K19/0718 ,  G06K19/077 ,  G06K19/0715 ,  G06K19/0723 ,  H02M3/33507 ,  H02M3/33584

Abstract: An internal voltage generation circuit of a smart card to perform fingerprint authentication and a smart card includes a first contact switch, a second contact switch, a switched capacitor converter and a bidirectional switched capacitor converter. The first contact switch selectively switches a contact voltage to a first node based on a first switching enable signal, in a contact mode. The second contact switch selectively switches the contact voltage to a second node based on a second switching enable signal, in the contact mode. The bidirectional switched capacitor converter steps down a first driving voltage of the first node to provide a second voltage to the second node in the contactless mode and either steps down the first driving voltage or boosts a second driving voltage of the second node based on a level of the contact voltage to provide a boosted voltage to the first node in the contact mode.

公开(公告)号：US12210921B2

公开(公告)日：2025-01-28

申请号：US18103731

申请日：2023-01-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Eunsang Jang ,  Junho Kim ,  Jisoo Chang

IPC: G06K19/07 ,  H02M1/00 ,  H02M3/07 ,  H03K17/0412 ,  H03K17/16

Abstract: A bi-directional voltage converter of a smart card includes switching elements connected between an input node and an output node and a start-up transistors whose channel width over channel length is smaller than a channel width over channel length of the switching element. The bi-directional voltage converter stores a driving voltage applied to an output node in a storage capacitor during a booting operation and provides the voltage stored in the storage capacitor to an input node. The bi-directional voltage converter may boost another driving voltage at the input node step-wisely and may perform bi-directional voltage converting with reduced occupied area and high efficiency.

公开(公告)号：US20240232564A9

公开(公告)日：2024-07-11

申请号：US18396071

申请日：2023-12-26

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Eunsang Jang ,  Junho Kim ,  Inhyuk Kim

IPC: G06K19/07 ,  G06K19/077 ,  H02M3/335

CPC classification number: G06K19/0718 ,  G06K19/0715 ,  G06K19/0723 ,  G06K19/077 ,  H02M3/33507 ,  H02M3/33584

Abstract: An internal voltage generation circuit of a smart card to perform fingerprint authentication and a smart card includes a first contact switch, a second contact switch, a switched capacitor converter and a bidirectional switched capacitor converter. The first contact switch selectively switches a contact voltage to a first node based on a first switching enable signal, in a contact mode. The second contact switch selectively switches the contact voltage to a second node based on a second switching enable signal, in the contact mode. The bidirectional switched capacitor converter steps down a first driving voltage of the first node to provide a second voltage to the second node in the contactless mode and either steps down the first driving voltage or boosts a second driving voltage of the second node based on a level of the contact voltage to provide a boosted voltage to the first node in the contact mode.

公开(公告)号：US11599760B2

公开(公告)日：2023-03-07

申请号：US17227711

申请日：2021-04-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Eunsang Jang ,  Junho Kim ,  Jisoo Chang

IPC: H02M3/07 ,  G06K19/07 ,  H02M1/00 ,  H03K17/0412 ,  H03K17/16

Abstract: A bi-directional voltage converter of a smart card includes switching elements connected between an input node and an output node and a start-up transistors whose channel width over channel length is smaller than a channel width over channel length of the switching element. The bi-directional voltage converter stores a driving voltage applied to an output node in a storage capacitor during a booting operation and provides the voltage stored in the storage capacitor to an input node. The bi-directional voltage converter may boost another driving voltage at the input node step-wisely and may perform bi-directional voltage converting with reduced occupied area and high efficiency.