POWER AMPLIFIER SYSTEM AND ASSOCIATED CONTROL CIRCUIT AND CONTROL METHOD
    5.
    发明公开
    POWER AMPLIFIER SYSTEM AND ASSOCIATED CONTROL CIRCUIT AND CONTROL METHOD 审中-公开
    功率放大器系统及相关控制电路及控制方法

    公开(公告)号:EP3197048A1

    公开(公告)日:2017-07-26

    申请号:EP16199083.3

    申请日:2016-11-16

    Applicant: MediaTek Inc.

    Abstract: A control circuit (230) of a power amplifier (210) includes a peak detector (320), a first comparator (332), a first current source (334), a second comparator (342), a second current source (344) and a bias circuit (350). The peak detector (320) is arranged for detecting an amplitude of an input signal. The first comparator (332) is arranged for comparing the amplitude of the input signal with a first threshold to generate a first comparing result. The first current source (334) is arranged for generating a first current according to the first comparing result. The second comparator (342) is arranged for comparing the amplitude of the input signal with a second threshold to generate a second comparing result. The second current source (344) is arranged for generating a second current according to the second comparing result. The bias circuit (350) is arranged for generating a bias voltage according to the first current and the second current to the power amplifier (210).

    Abstract translation: 功率放大器(210)的控制电路(230)包括峰值检测器(320),第一比较器(332),第一电流源(334),第二比较器(342),第二电流源(344) 和偏置电路(350)。 峰值检测器(320)被布置用于检测输入信号的幅度。 第一比较器(332)用于将输入信号的幅度与第一阈值进行比较以产生第一比较结果。 第一电流源(334)用于根据第一比较结果产生第一电流。 第二比较器(342)用于将输入信号的幅度与第二阈值进行比较以产生第二比较结果。 第二电流源344用于根据第二比较结果产生第二电流。 偏置电路(350)被设置用于根据到功率放大器(210)的第一电流和第二电流产生偏置电压。

    SELF-BIASING OUTPUT BOOSTER AMPLIFIER AND USE THEREOF
    6.
    发明公开
    SELF-BIASING OUTPUT BOOSTER AMPLIFIER AND USE THEREOF 审中-公开
    自偏置输出放大器及其用途

    公开(公告)号:EP3197046A1

    公开(公告)日:2017-07-26

    申请号:EP17153080.1

    申请日:2017-01-25

    Abstract: The present invention relates to a self-biasing output booster amplifier (200) comprising an input amplifier stage (201), an output amplifier stage (206) being operatively connected to an output of the input amplifier stage, and first (203) and second (202) current copying circuits, wherein the second current copying circuit (202) is biased from an output of the self-biasing output booster amplifier (+). The first (203) and second (203) current copying circuits are configured to copy at least a portion of the current (Ios) through the output amplifier stage (206). The sum of the output of the second current copying circuit (202) and the output of the output amplifier stage (206) provides the output current (Isource - Io) of the self-biasing output booster amplifier (200), Finally, the input amplifier stage (201) is biased from the output of the second current copying circuit (202).

    Abstract translation: 本发明涉及包括输入放大器级(201),可操作地连接到输入放大器级的输出的输出放大器级(206)的自偏置输出升压放大器(200),以及第一(203)和第二 (202)电流复制电路,其中所述第二电流复制电路(202)从所述自偏置输出升压放大器(+)的输出偏置。 第一(203)和第二(203)电流复制电路被配置为通过输出放大器级(206)复制电流(Ios)的至少一部分。 第二电流复制电路(202)的输出和输出放大器级(206)的输出之和提供自偏置输出升压放大器(200)的输出电流(Isource-Io)。最后,输入 放大器级(201)被从第二电流复制电路(202)的输出偏置。

    INPUT STAGE OF CHIP AND METHOD FOR CONTROLLING SOURCE DRIVER OF CHIP
    7.
    发明公开
    INPUT STAGE OF CHIP AND METHOD FOR CONTROLLING SOURCE DRIVER OF CHIP 审中-公开
    EANGANGSSTUFE EINES CHIPS UND VERFAHREN ZUR STEUERUNG DES QUELLTREIBERS EINES CHIPS

    公开(公告)号:EP3151423A1

    公开(公告)日:2017-04-05

    申请号:EP16170310.3

    申请日:2016-05-19

    Applicant: MediaTek Inc.

    Inventor: HUANG, Mu-Chen

    Abstract: An input stage of a chip (1 00) includes a source follower (110) and a sensing and clamping circuit (120). The source follower (110) is arranged for receiving an AC-coupled signal to generate an output signal at an output terminal. The sensing and clamping circuit (1 20) is coupled to the source follower (110), and is arranged for clamping the output terminal of the source follower (110) at a fixed DC voltage.

    Abstract translation: 芯片(100)的输入级包括源极跟随器(110)和感测和钳位电路(120)。 源极跟随器(110)布置成用于接收AC耦合信号以在输出端产生输出信号。 感测和钳位电路(120)耦合到源极跟随器(110),并且被布置成以固定的DC电压钳位源极跟随器(110)的输出端子。

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