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    AMPLIFIER CIRCUIT FOR A DIGITAL POWER AMPLIFIER
    2.
    发明公开
    AMPLIFIER CIRCUIT FOR A DIGITAL POWER AMPLIFIER 审中-公开

    公开(公告)号：EP4439981A1

    公开(公告)日：2024-10-02

    申请号：EP23165924.4

    申请日：2023-03-31

    Applicant: INTEL Corporation

    Inventor： DEGANI, Ofir ,  SHAY, Naor Roi

    IPC: H03F3/193 ,  H03F3/217 ,  H03F3/24 ,  H03F3/30

    CPC classification number: H03F3/2171 ,  H03F3/245 ,  H03F3/193 ,  H03F3/3015

    Abstract: An amplifier circuit may include a plurality of transistors connected in series, the plurality of transistors including: a first transistor of a first conductivity type, a second transistor of the first conductivity type, and a third transistor of the first conductivity type coupled to the first transistor of the first conductivity type and the second transistor of the first conductivity type, the first transistor of the first conductivity type comprising a control terminal to receive a first signal varying between a first upper voltage level and a first lower voltage level; a first transistor of a second conductivity type, a second transistor of the second conductivity type, and a third transistor of the second conductivity type coupled to the first transistor of the second conductivity type and the second transistor of the second conductivity type, the first transistor of the second conductivity type comprising a control terminal to receive a second signal varying between a second upper voltage level and a second lower voltage level; an output terminal coupled to the second transistor of the first conductivity type and the second transistor of the second conductivity type, the output terminal is configured to provide an output signal varying between the first upper voltage level and the second lower voltage level; and a feedback circuit configured to provide signals that are in phase with the output signal to a control terminal of the third transistor of the first conductivity type and to a control terminal of the third transistor of the second conductivity type.

    THERMAL DROOP COMPENSATION IN POWER AMPLIFIERS
    5.
    发明公开
    THERMAL DROOP COMPENSATION IN POWER AMPLIFIERS 审中-公开

    公开(公告)号：EP4415258A1

    公开(公告)日：2024-08-14

    申请号：EP24157234.6

    申请日：2024-02-13

    Applicant: Qorvo US, Inc.

    Inventor： BELLANTONI, John ,  O'NEAL, Michael Kevin ,  PAGE, Charles

    IPC: H03F1/30 ,  H03F3/195 ,  H03F3/24

    CPC classification number: H03F2200/44720130101 ,  H03F2200/45120130101 ,  H03F1/30 ,  H03F3/245 ,  H03F3/195 ,  H03F2200/46820130101 ,  H03F2200/40820130101

    Abstract: Systems and methods for thermal droop compensation in power amplifiers are disclosed. In one aspect, a droop compensation circuit is added to a temperature-sensitive active bias circuit in a power amplifier chain. The droop compensation circuit relies on current mirroring to draw a trigger current that may be used by a correction circuit to create an additional bias signal that offsets temperature-induced droop in the power amplifier. Variations contemplate where the bias signal is injected within the power amplifier chain and what form the correction circuit may take (e.g., an attenuator, a variable gain amplifier (VGA), or the like). By compensating for temperature droop in this fashion, rapid pulsing signals that generate rapid pulses of heat may be transmitted across an effectively linear power amplifier chain without having to deal with droop effects.

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