公开(公告)号：US20230206020A1

公开(公告)日：2023-06-29

申请号：US18111014

申请日：2023-02-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyeongdo KIM ,  Sanghyo LEE ,  Seungwon LEE ,  Jongpil CHO

IPC: G06K19/077 ,  G06K19/07 ,  H02M1/08

CPC classification number: G06K19/07773 ,  G06K19/0715 ,  H02M1/08 ,  H02M3/156

Abstract: A smart card includes an antenna to transmit and to receive a radio frequency signal, a rectifier to rectify a signal received through the antenna to output a rectified voltage, a voltage regulator to operate in a first operation mode for stabilizing a level of the rectified voltage and a second operation mode for generating an internal voltage using the rectified voltage, a regulator converter to control the voltage regulator to operate the voltage regulator in one of the first operation and the second operation according to a mode selection signal, a clamp circuit to connect an output terminal of the rectifier to a ground according to the mode selection signal, a load modulator to vary a resistance of the antenna to perform a load modulation, and a regulator controller to generate the mode selection signal according to whether the load modulator is activated or deactivated.

公开(公告)号：US20240242059A1

公开(公告)日：2024-07-18

申请号：US18356292

申请日：2023-07-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Kyeongdo KIM ,  Minhyeok KANG

IPC: G06K19/077 ,  G05F1/575

CPC classification number: G06K19/07773 ,  G05F1/575 ,  H02M7/06

Abstract: A smart card may include: an antenna configured to receive at least one radio signal;
a load circuit that is connected to both ends of the antenna; a rectifier configured to rectify the at least one radio signal received through the antenna, and provide the rectified signal to an output terminal; and a power generator including a voltage regulator, a first diode, and a second diode, the voltage regulator configured to provide an internal voltage, the first diode and the second diode connected in series between the output terminal of the rectifier and a first node, and the first node is configured to receive the internal voltage during a first mode of the smart card, the first mode being a mode during which a load of the load circuit is modulated.

公开(公告)号：US20190213459A1

公开(公告)日：2019-07-11

申请号：US16233886

申请日：2018-12-27

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyeongdo KIM ,  Sanghyo LEE ,  Seungwon LEE ,  Jongpil CHO

IPC: G06K19/077 ,  H02M3/156 ,  H02M1/08 ,  G06K19/07

CPC classification number: G06K19/07773 ,  G06K19/0715 ,  H02M1/08 ,  H02M3/156 ,  H02M7/06 ,  H02M2001/0045

Abstract: A smart card includes an antenna to transmit and to receive a radio frequency signal, a rectifier to rectify a signal received through the antenna to output a rectified voltage, a voltage regulator to operate in a first operation mode for stabilizing a level of the rectified voltage and a second operation mode for generating an internal voltage using the rectified voltage, a regulator converter to control the voltage regulator to operate the voltage regulator in one of the first operation and the second operation according to a mode selection signal, a clamp circuit to connect an output terminal of the rectifier to a ground according to the mode selection signal, a load modulator to vary a resistance of the antenna to perform a load modulation, and a regulator controller to generate the mode selection signal according to whether the load modulator is activated or deactivated.

公开(公告)号：US20220376734A1

公开(公告)日：2022-11-24

申请号：US17708408

申请日：2022-03-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Minchul KANG ,  Sanghyo LEE ,  Kyeongdo KIM ,  Inhyuk KIM

IPC: H04B1/40 ,  H04B1/10 ,  H03H7/38 ,  H03H7/06 ,  H02J50/80

Abstract: A communication device is provided. The communication device includes: an antenna; a matching circuit connected with the antenna; a transmitter configured to generate a transmission communication signal and provide the transmission communication signal to the antenna through the matching circuit; a filter connected between the matching circuit and the antenna; and a receiver configured to receive an attenuated signal from the antenna through the filter. The filter is configured to pass frequencies of an antenna signal corresponding to a pass band and attenuate frequencies of the antenna signal corresponding to a stop band, and a center frequency of the transmission communication signal corresponds to the stop band of the filter.

公开(公告)号：US20210334618A1

公开(公告)日：2021-10-28

申请号：US17366908

申请日：2021-07-02

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyeongdo KIM ,  Sanghyo LEE ,  Seungwon LEE ,  Jongpil CHO

IPC: G06K19/077 ,  G06K19/07 ,  H02M1/08

Abstract: A smart card includes an antenna to transmit and to receive a radio frequency signal, a rectifier to rectify a signal received through the antenna to output a rectified voltage, a voltage regulator to operate in a first operation mode for stabilizing a level of the rectified voltage and a second operation mode for generating an internal voltage using the rectified voltage, a regulator converter to control the voltage regulator to operate the voltage regulator in one of the first operation and the second operation according to a mode selection signal, a clamp circuit to connect an output terminal of the rectifier to a ground according to the mode selection signal, a load modulator to vary a resistance of the antenna to perform a load modulation, and a regulator controller to generate the mode selection signal according to whether the load modulator is activated or deactivated.