Sealing cover
    6.
    发明授权

    公开(公告)号:US10569943B2

    公开(公告)日:2020-02-25

    申请号:US15580266

    申请日:2016-06-08

    申请人: Ping Li

    发明人: Ping Li

    摘要: Disclosed is a sealing cover, which is suitable for sealing an opening of a container, comprising an extrusion lid and a flexible sealing ring, wherein the container has an opening, the extrusion lid comprises an outer cover, an inner shield cover, a screw rod and a knob, the outer cover covers the opening, and the inner shield cover is arranged in the opening and is located under the outer cover; the screw rod movably penetrates the outer cover, the lower end of the screw rod is fixedly connected to the inner shield cover, and the upper end of the screw rod is connected in a threaded manner to the knob; and the flexible sealing ring is sheathed on the screw rod and is located between the outer cover and the inner shield cover, and when the knob is rotated, the screw rod drives the inner shield cover to move upwards and squeezes the flexible sealing ring to force the flexible sealing ring to be attached to an inner circumferential wall of the opening after expansion to form a seal. The sealing cover provided by the present invention can seal the opening of a container, and the sealing cover has a simple structure, is convenient to use, and has a good sealing effect.

    Apparatus and methods for biasing power amplifiers
    9.
    发明授权
    Apparatus and methods for biasing power amplifiers 有权
    用于偏置功率放大器的装置和方法

    公开(公告)号:US08717101B2

    公开(公告)日:2014-05-06

    申请号:US13468749

    申请日:2012-05-10

    IPC分类号: H03G3/30

    摘要: Apparatus and methods for biasing a power amplifier are disclosed. In one embodiment, a method of biasing a power amplifier includes shaping an enable signal using a time-dependent signal generator to generate a control current, amplifying the control current using a current amplifier to generate a correction current, and generating a bias current for a power amplifier using a primary biasing circuit. The primary biasing circuit is configured to use the correction current to correct for a variation in gain of the power amplifier when the power amplifier is enabled.

    摘要翻译: 公开了用于偏置功率放大器的装置和方法。 在一个实施例中,偏置功率放大器的方法包括使用时间相关的信号发生器对使能信号进行整形以产生控制电流,使用电流放大器放大控制电流以产生校正电流,并产生用于 功率放大器使用主偏置电路。 主要偏置电路被配置为当功率放大器被使能时,使用校正电流来校正功率放大器的增益的变化。