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    AN AMPLIFIER CIRCUIT, A TRANSMITTER AND A WIRELESS TELEPHONE
    2.
    发明公开
    AN AMPLIFIER CIRCUIT, A TRANSMITTER AND A WIRELESS TELEPHONE 失效
    放大电路，传输器和无线耳机

    公开(公告)号：EP0891650A2

    公开(公告)日：1999-01-20

    申请号：EP98900041.0

    申请日：1998-01-15

    Applicant: Koninklijke Philips Electronics N.V.

    Inventor： VISSER, Hendrik, Arend

    IPC: H03F3 ,  H03F1

    CPC classification number: H03F1/0261 ,  H03F3/50 ,  H03F2200/24 ,  H03F2203/5012 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031

    Abstract: An amplifier circuit, particularly for RF-purposes comprises: a main current stream of a controllable RF-semiconductor device having a control input, a control means having a control output coupled to the control input for controlling the main current stream, and a compensation circuit having a compensation output coupled to the control input for compensating the controllable semiconductor device. The compensation circuit is constructed so as to be temporarily active during a period of time wherein the control means do not supply a control output signal to the control input of the controllable semiconductor device. This provides a suitable solution for IC's and for dealing with DC-adjustment disturbances in a low DC-current dissipating manner caused by a lack of pull-down capability when the amplifier circuit operates at very high frequencies or at relatively large amplitudes.

    AN AMPLIFIER CIRCUIT, A TRANSMITTER AND A WIRELESS TELEPHONE
    4.
    发明授权
    AN AMPLIFIER CIRCUIT, A TRANSMITTER AND A WIRELESS TELEPHONE 失效
    放大电路，传输器和无线耳机

    公开(公告)号：EP0891650B1

    公开(公告)日：2004-08-04

    申请号：EP98900041.9

    申请日：1998-01-15

    Applicant: Koninklijke Philips Electronics N.V.

    Inventor： VISSER, Hendrik, Arend

    IPC: H03F1/02

    CPC classification number: H03F1/0261 ,  H03F3/50 ,  H03F2200/24 ,  H03F2203/5012 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031

    Abstract: An amplifier circuit, particularly for RF-purposes comprises: a main current stream of a controllable RF-semiconductor device having a control input, a control means having a control output coupled to the control input for controlling the main current stream, and a compensation circuit having a compensation output coupled to the control input for compensating the controllable semiconductor device. The compensation circuit is constructed so as to be temporarily active during a period of time wherein the control means do not supply a control output signal to the control input of the controllable semiconductor device. This provides a suitable solution for IC's and for dealing with DC-adjustment disturbances in a low DC-current dissipating manner caused by a lack of pull-down capability when the amplifier circuit operates at very high frequencies or at relatively large amplitudes.

    Emitterfolger-Schaltungsanordnung
    5.
    发明公开
    Emitterfolger-Schaltungsanordnung 失效
    Emitterfolger-Schaltungsanordnung。

    公开(公告)号：EP0448828A2

    公开(公告)日：1991-10-02

    申请号：EP90125155.3

    申请日：1990-12-21

    Applicant: TEMIC TELEFUNKEN microelectronic GmbH

    Inventor： Tränkle, GÀ¼nther, Dipl.-Phys.

    IPC: H03F3/50 ,  H03F3/30

    CPC classification number: H03F3/50 ,  H03F2203/5015 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031

    Abstract: Zur Verminderung der Verlustleistung einer als Emitterfolger (T1) mit Stromquelle (T2) ausgeführten Schaltungsanordnung ohne PNP-Transistoren zur Speisung einer Lastimpedanz (RL) mit geeigneter Quellimpedanz nach Maßgabe eines hochfrequenten Wechselspannungs-Steuersignals ist die Stromquelle (T2) steuerbar und ein an den Steuereingang der Stromquelle (T2) angelegtes, zum Steuersignal (S) komplementäres Signal (S') moduliert den Strom durch die Stromquelle (T2).

    Abstract translation: 为了减少电路布置的功耗，构成为具有电流源的射极跟随器，没有PNP晶体管用于馈送具有由高频交流电压控制信号确定的适当源阻抗的负载阻抗，电流源是可控的，并且 与控制信号互补并施加到电流源的控制输入的信号调制通过电流源的电流。

    APPARATUS FOR PERFORMING CAPACITOR AMPLIFICATION IN AN ELECTRONIC DEVICE
    6.
    发明公开
    APPARATUS FOR PERFORMING CAPACITOR AMPLIFICATION IN AN ELECTRONIC DEVICE 审中-公开
    爱尔兰EORKTRONISCHEN VORRICHTUNG VORRICHTUNG ZURDURCHFÜHRUNGVONKONDENSATORVERSTÄRKUNG

    公开(公告)号：EP3148073A1

    公开(公告)日：2017-03-29

    申请号：EP16170308.7

    申请日：2016-05-19

    Applicant: MediaTek Inc.

    Inventor： WANG, Huai-Te

    IPC: H03F3/50

    CPC classification number: H03F3/505 ,  H03F1/342 ,  H03F2200/129 ,  H03F2200/144 ,  H03F2200/21 ,  H03F2200/303 ,  H03F2200/42 ,  H03F2200/69 ,  H03F2203/45061 ,  H03F2203/45084 ,  H03F2203/5024

    Abstract: An apparatus (100) for performing capacitor amplification in an electronic device may include a first resistor (R cmp ) and a second resistor (R cmn ) that are connected in series and coupled between a set of input terminals of a receiver in the electronic device, a common mode capacitor (C cm ) having a first terminal coupled to a common mode terminal and having a second terminal, and an alternating current-coupled amplifier (110A), hereinafter AC-coupled amplifier, that is coupled between the common mode terminal and the second terminal of the common mode capacitor (C cm ). The first resistor (R cmp ) and the second resistor (R cmn ) may be arranged for obtaining a common mode voltage (V cm ) at the common mode terminal (V cm ) between the first resistor (R cmp ) and the second resistor (R cmn ). In addition, the common mode capacitor (C cm ) may be arranged for reducing a common mode return loss. Additionally, the AC-coupled amplifier (110A) may be arranged for performing capacitor amplification for the common mode capacitor (C cm ).

    Abstract translation: 一种用于在电子设备中进行电容放大的设备（100）可以包括串联连接并连接在电子设备中的接收器的一组输入端之间的第一电阻器（R cmp）和第二电阻器（R cmn） ，具有耦合到共模端子并具有第二端子的第一端子的共模电容器（C cm）和耦合在共模端子之间的交流耦合放大器（110A），以下称为AC耦合放大器 和共模电容器的第二端子（C cm）。 可以布置第一电阻器（R cmp）和第二电阻器（R cmn），以获得第一电阻器（R cmp）和第二电阻器（R cmp）之间的共模端子（V cm）处的共模电压（V cm） R cmn）。 此外，可以设置共模电容器（C cm）以减少共模回波损耗。 此外，AC耦合放大器（110A）可以被布置为对共模电容器（C cm）进行电容放大。

    DISTORTION COMPENSATION FOR A CAPACITIVELY LOADED FOLLOWER
    7.
    发明公开
    DISTORTION COMPENSATION FOR A CAPACITIVELY LOADED FOLLOWER 失效
    失真补偿加载的福尔杰电路的电容

    公开(公告)号：EP0819339A1

    公开(公告)日：1998-01-21

    申请号：EP97900081.0

    申请日：1997-01-17

    Applicant: PHILIPS ELECTRONICS N.V.

    Inventor： VORENKAMP, Pieter

    IPC: H03F1 ,  H03F3 ,  H03K19

    CPC classification number: H03F3/50 ,  H03F1/3223 ,  H03F2203/5015 ,  H03F2203/5021 ,  H03F2203/5024 ,  H03F2203/5031

    Abstract: The odd harmonic distortion components in the output signal (vo) of a capacitively loaded follower transistor (2) is reduced by means of an additional transistor (14) inserted between the emitter of the follower transistor (2) and the bias current source (12) of the follower transistor (2) and a second follower transistor (18) which receives the same input signal as the follower transistor (2) and which has its emitter coupled to the emitter of the additional transistor (14) via a compensation capacitor (20). The current iC through the compensation capacitor (20) is added to the output current (io) and compensates for the odd harmonic distortion.

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