ELECTRONIC CIRCUIT FOR DELIVERING SIGNALS IN QUADRATURE

    公开(公告)号:US20240235907A9

    公开(公告)日:2024-07-11

    申请号:US18491212

    申请日:2023-10-20

    CPC classification number: H04L27/2273 H03B5/1228 H03B2200/0078

    Abstract: Embodiments provide a device that includes a first circuit having a first input to receive a first sine wave signal and a second input to receive a second sine wave signal in quadrature with respect to each other and a current mode logic gate having a first input coupled to a first output of the first circuit and a second input coupled to a second output of the first circuit. The first circuit configured to deliver a first square wave signal and a second square wave signal. The current mode logic gate is configured to deliver a third square wave signal at a first level and a fourth square wave signal at a second level when the first and second square wave signals are simultaneously at their first levels and the first square wave signal is ahead of the second square wave signal.

    Telepowered contactless card
    29.
    发明授权

    公开(公告)号:US12132495B2

    公开(公告)日:2024-10-29

    申请号:US18069459

    申请日:2022-12-21

    CPC classification number: H03M1/124 H04B5/72 G06K19/07773 H04B5/00

    Abstract: The present disclosure concerns an electronic device connected to an antenna. The electronic device delivers a first amplitude-modulated analog signal of a signal captured by the antenna, the capture signal associated with an electromagnetic field exhibiting intervals at a minimum level. The electronic device includes a first circuit, a second circuit, and a third circuit. The first circuit delivers a second analog signal by rectification and filters the first analog signal. The second circuit delivers a first binary signal based on the demodulation of the second analog signal. The third circuit couples the antenna to a resistor during each pause. The resistance value of the resistor depends on the maximum amplitude of the electromagnetic field before the pause.

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