Near-Field Communication Circuit, Interface, and System

    公开(公告)号:US20190268040A1

    公开(公告)日:2019-08-29

    申请号:US16277678

    申请日:2019-02-15

    Abstract: A circuit includes a near-field communication circuit configured to receive a radio frequency control signal transmitted in a near-field regime, a pulse width modulation signal generation circuit coupled to the near-field communication circuit circuit and configured to generate a pulse width modulation signal according to the radio frequency control signal, and a non-volatile memory coupled to both the near-field communication circuit circuit and the pulse width modulation signal generation circuit, the non-volatile memory comprising digital words for configuring the pulse width modulation signal.

    Method for modulating the impedance of an antenna circuit
    3.
    发明授权
    Method for modulating the impedance of an antenna circuit 有权
    用于调制天线电路阻抗的方法

    公开(公告)号:US08896368B2

    公开(公告)日:2014-11-25

    申请号:US14090843

    申请日:2013-11-26

    CPC classification number: G05F1/10 G06K19/0713

    Abstract: An electromagnetic transponder includes an antenna circuit, a load, and a charge pump transistor having a current path coupled between the antenna circuit and the load. During operation, a retromodulated signal is transmitted at a first level by biasing the charge pump transistor during a first time period such that an impedance of the antenna circuit has a first impedance value and current flows from the antenna circuit to the load. A retromodulated signal at a second level is transmitted by biasing the charge pump transistor during a second time period such that the impedance of the antenna circuit has a second impedance value different than the first impedance value and current flows from the antenna circuit to the load. The retromodulated signals are transmitted at the first and second levels in a sequence determined to transmit information from the electromagnetic transponder.

    Abstract translation: 电磁应答器包括天线电路,负载和电荷泵晶体管,其具有耦合在天线电路和负载之间的电流路径。 在操作期间,通过在第一时间期间偏置电荷泵晶体管,以使得天线电路的阻抗具有第一阻抗值并且电流从天线电路流向负载,通过在第一电平上传输重新校正的信号。 通过在第二时间段期间偏置电荷泵晶体管来传输第二电平的重新调制信号,使得天线电路的阻抗具有与第一阻抗值不同的第二阻抗值,并且电流从天线电路流向负载。 重新校正的信号以确定为从电磁应答器发送信息的顺序在第一和第二电平处发送。

    Control system using near-field communication

    公开(公告)号:US10826566B2

    公开(公告)日:2020-11-03

    申请号:US16286345

    申请日:2019-02-26

    Abstract: A system includes a near-field communication device configured to transmit a radio frequency control signal in a near-field regime and an interface. The interface includes a near-field communication circuit configured to receive the RF control signal. The interface further includes a pulse width modulation signal generation circuit configured to generate a pulse width modulation signal according to the radio frequency control signal. The system further includes an electrically-controllable equipment configured to be controlled by the pulse width modulation signal.

    Control System Using Near-Field Communication

    公开(公告)号:US20190268043A1

    公开(公告)日:2019-08-29

    申请号:US16286345

    申请日:2019-02-26

    Abstract: A system includes a near-field communication device configured to transmit a radio frequency control signal in a near-field regime and an interface. The interface includes a near-field communication circuit configured to receive the RF control signal. The interface further includes a pulse width modulation signal generation circuit configured to generate a pulse width modulation signal according to the radio frequency control signal. The system further includes an electrically-controllable equipment configured to be controlled by the pulse width modulation signal.

    Pulse Width Modulation Signal Generation
    9.
    发明申请

    公开(公告)号:US20190266462A1

    公开(公告)日:2019-08-29

    申请号:US16277698

    申请日:2019-02-15

    Abstract: A method of reducing noise generated by pulse width modulation (PWM) signals includes generating a PWM pulse train using a first set of parameter values and modifying the PWM pulse train during a near-field communication so that the PWM pulse train is generated using a second set of parameter values. Modifying the PWM pulse train includes reducing at least one parameter value of the first set of parameter values. The method further includes resuming generation of the PWM pulse train using the first set of parameter values after the near-field communication.

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