Protection circuit in electronic device and method therefor

    公开(公告)号:US12074572B2

    公开(公告)日:2024-08-27

    申请号:US17263044

    申请日:2020-10-30

    CPC classification number: H03F1/52 H02H3/087 H03F3/245 H03F2200/462

    Abstract: An electronic device and method thereof of are provided to prevent burnout due to overcurrent. An electronic device includes a power amplifier configured to amplify a transmission signal; a battery configured to provide a bias voltage to the at least one power amplifier; and an overcurrent protection circuit configured to prevent overcurrent from flowing through the power amplifier. The overcurrent protection circuit includes a configurer configured to configure a reference current value, based on the power amplifier; a measurer configured to measure a bias current value due to the bias voltage; a comparator configured to compare the measured bias current value with the reference current value; and a controller configured to recognize overcurrent flowing through the power amplifier and control provision of the bias voltage, based on a result of the comparison.

    Driving circuit including a first and second driving mode and method of operating the same

    公开(公告)号:US11875738B2

    公开(公告)日:2024-01-16

    申请号:US17691654

    申请日:2022-03-10

    Abstract: A display driver integrated circuit includes a gamma circuit, a control circuit, and an output buffer circuit. The gamma circuit generates a plurality of gamma voltages based on gamma control information, a first gamma power supply voltage and a second gamma power supply voltage. The control circuit calculates a gamma limit value based on panel brightness information, voltage levels of the first and second gamma power supply voltages and the number of the plurality of gamma voltages. The control circuit generates a mode determination signal. The output buffer circuit includes a plurality of buffer circuits. Each of the plurality of buffer circuits includes an input stage and the input stage includes first transistors and second transistors. In a first driving mode, each of the plurality of buffer circuits turns off the first transistors and turns on the second transistors included in the input stage.

    Electronic device and antenna control method of electronic device

    公开(公告)号:US11223375B2

    公开(公告)日:2022-01-11

    申请号:US16765813

    申请日:2018-11-23

    Abstract: An electronic device can comprise: a processor; a transceiver connected to the processor; a first front-end unit connected to the transceiver and performing transmission/reception at an LTE low-band frequency; a second front-end unit connected to the transceiver and performing transmission/reception at an LTE middle-band frequency and/or an LTE high-band frequency; a third front-end unit connected to the transceiver and performing transmission/reception at a 5G-band frequency; a diplexer unit connected to the first front-end unit and the second front-end unit; a filter unit connected to the third front-end unit; a first antenna connected to the diplexer unit; a second antenna connected to the filter unit; and a third antenna connected to the third front-end unit.

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