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    MULTIPLEXED INPUT ENVELOPE RESTORATION SCHEME FOR LINEAR HIGH-EFFICIENCY POWER AMPLIFICATION
    41.
    发明授权
    MULTIPLEXED INPUT ENVELOPE RESTORATION SCHEME FOR LINEAR HIGH-EFFICIENCY POWER AMPLIFICATION 有权
    CASE恢复MATRIX MULTIPLEXIERTEM输入端口，用于高性能线性性能提升

    公开(公告)号：EP1346470B1

    公开(公告)日：2008-07-16

    申请号：EP01991317.7

    申请日：2001-12-18

    Applicant: Ericsson Inc.

    Inventor： PEHLKE, David R.

    IPC: H03F3/217

    CPC classification number: H03F3/2178 ,  H03F3/2176

    Abstract: A circuit for providing a multiplexed input to an amplifier load matching network (12). The circuit includes a control device (14) receiving amplitude information (24) and phase information from a primary waveform, a plurality of switching devices (16, 18, 20, 22) in communication with the control device (14) and the amplifier, wherein each of the switching devices has a different "ON" resistance. The control device uses the amplitude information to select an active switching device and to control the device using phase information (26) to create a secondary waveform for input to the load matching network (12). In this way, an amplitude modulated waveform is amplified at high efficiency, enabling applicaiton of either all or part of the phase and/or amplitude modulation at the input of the amplifier.

    A METHOD FOR VOLTAGE MODULATION
    42.
    发明公开
    A METHOD FOR VOLTAGE MODULATION 有权
    方法电压调制

    公开(公告)号：EP1872473A1

    公开(公告)日：2008-01-02

    申请号：EP06744530.4

    申请日：2006-04-20

    Applicant: O.C.E.M. S.P.A.

    Inventor： RINALDI, Luigi

    IPC: H03F3/217

    CPC classification number: H03F1/0244 ,  H03F1/0205 ,  H03F3/2175 ,  H03F3/2178 ,  H03F2200/507 ,  H03F2200/78

    Abstract: In a method for voltage modulation using a plurality of modules (2) connected in series and connected to a load (3) , the modules having supply sources (Aj) and switching means (Mj ) to connect or disconnect the supply sources so as to either decrease or increase, respectively, a voltage applied to the load (3), by a value equal to the voltage (Ej) supplied by the supply source, the switching means (Mj) are controlled by a central unit (1) , according to processing of at least one modulating signal (m) . The method provides for a balanced operation of the modules (2) and a considerable increase of the duty cycle frequency (fc) , keeping the same heat losses on each module, so that a smaller and less expensive low-pass filter can be set on the load (3) .

    Prescaler circuit and buffer circuit
    43.
    发明公开
    Prescaler circuit and buffer circuit 审中-公开
    Vorskalierschaltung und Pufferschaltung

    公开(公告)号：EP1841070A2

    公开(公告)日：2007-10-03

    申请号：EP06119268.8

    申请日：2006-08-21

    Applicant: FUJITSU LIMITED

    Inventor： Aoki, Koju ,  Hasegawa, Katashi ,  Baba, Hiroshi

    IPC: H03K23/00 ,  H03L7/00

    CPC classification number: H03K21/023 ,  H03F3/2178 ,  H03F2200/333 ,  H03F2200/351 ,  H03G1/007 ,  H03L7/193

    Abstract: A prescaler that operates in a broad band. The prescaler (33) includes a buffer (41) and a counter (43). The buffer includes a first amplification circuit (50), which has three inverter circuits (52a, 52b, 52c) of different drive capacities, a second amplification circuit (54), which has four series-connected inverter circuits (54a, 54b, 54c, 54d), and a feedback circuit (55). One of the inverter circuits (52a, 52b, 52c) is connected between a capacitor (C1) and an inverter circuit (54a) via a first switch circuit (51) and a second switch circuit (53). This varies the drive capacity of the first amplification circuit (50). The feedback circuit (55) functions as a variable resistor having two transistors (T1, T2).

    Abstract translation: 一个在宽带上运行的预分频器。 预分频器（33）包括缓冲器（41）和计数器（43）。 缓冲器包括具有不同驱动电容的三个反相器电路（52a，52b，52c）的第一放大电路（50），具有四个串联连接的反相器电路（54a，54b，54c）的第二放大电路 ，54d）和反馈电路（55）。 一个逆变器电路（52a，52b，52c）经由第一开关电路（51）和第二开关电路（53）连接在电容器（C1）和逆变器电路（54a）之间。 这改变了第一放大电路（50）的驱动能力。 反馈电路（55）用作具有两个晶体管（T1，T2）的可变电阻器。

    Method and apparatus for generating a RF signal
    47.
    发明公开
    Method and apparatus for generating a RF signal 有权
    Verfahren und Vorrichtung zum Erzeugen eines hochfrequenten Sendesignals

    公开(公告)号：EP1102409A1

    公开(公告)日：2001-05-23

    申请号：EP99850172.0

    申请日：1999-11-18

    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON

    Inventor： Hellberg, Richard ,  Fonden, Tony ,  Dalipi, Spendim

    IPC: H04B1/04 ,  H04L27/04 ,  H04L27/20 ,  H04L27/26 ,  H03F3/217

    CPC classification number: H03F3/2178 ,  H03F3/24 ,  H03F2200/331 ,  H04B2001/0408 ,  H04B2001/0491

    Abstract: The invention is concerned with a method of generating a high-power modulated radio-frequency signal from a low- or medium frequency information signal by pulse-forming of the information signal by means of a quantifier to form a digital signal having discrete signal values, generating one or more carrier waves of radio frequency, amplification by means of an amplifier comprising switches into a switched radio-frequency signal carrying the information, the switching events being controlled by the information content of the digital signal, and achieving the desired signal by means of a filter. The method is characterized in the carrier waves are generated by means of alternating radio-frequency voltages and that the amplification is performed by connecting the switches to the alternating carrier voltages, thus causing mixing of the digital signals with a corresponding carrier signal, in accordance with a given information content of the digital signal. The invention is also concerned with an apparatus to carry said method.

    Abstract translation: 本发明涉及一种通过利用量化器脉冲形成信息信号从低频或中频信息信号产生高功率调制射频信号的方法，以形成具有离散信号值的数字信号， 产生一个或多个射频载波，借助于放大器的放大器，该放大器包括切换到携带该信息的切换射频信号，切换事件由数字信号的信息内容控制，并通过装置实现所需的信号 的过滤器。 该方法的特征在于，通过交替的射频电压产生载波，并且通过将开关连接到交变载波电压来执行放大，从而根据数字信号与相应的载波信号混合 数字信号的给定信息内容。 本发明还涉及一种携带所述方法的装置。

    Power amplifier having multiple switched stages
    50.
    发明公开
    Power amplifier having multiple switched stages 无效
    具有多个开关级的功率放大器

    公开(公告)号：EP0651501A3

    公开(公告)日：1995-06-07

    申请号：EP95100838.2

    申请日：1991-06-04

    Applicant: Continental Electronics Corporation

    Inventor： Weaver, Bryan Alexander ,  Dickey, Daniel Leo, Sr.

    IPC: H03F3/217 ,  H03F3/24

    CPC classification number: H03F3/2178 ,  H03F3/24

    Abstract: An amplifier responsive to a signal source 18 susceptible of having changing values as a function of time comprises at least several stages 34 switchable only to two different states, bi-level outputs associated with the states of the stages being summed together to derive a summed response that is a stepwise function of the source, means 109, 122, 121, 126, 125 responsive to the value of the signal source for deriving first and second commands 141 and 142 respectively indicating that the number of stages in one of said states is to increase and decrease, means 131, 132 responsive to the commands for increasing and decreasing the number of stages in first and second of said states so that the stage which has been in the first state the longest is switched to the second state in response to the second command and the stage which has been in the second state the longest is switched to the first state in response to the first command and for causing 123 different ones of said stages to be in the first state and different ones of said stages to be in the second state at different times even though there is no change in value of the source. As an alternative to deriving first and second commands, there may be derived a first indication 121 of the number of stages that should be in a first of said states and a second indication 125 of the number of stages actually in said first state, means 127 responsive to a comparison 126 of the first and second indications controlling the length of time each of said stages is in said first state and the number of said stages in said first state, said control means 127 including means 131 for storing a value commensurate with the number of stages in the one state, the value stored by the storing means being changed in response to the comparison indicating that the first indication exceeds the second indication and the second indication exceeds the first indication.

    Abstract translation: 响应于容易随时间变化的值的信号源18的放大器包括至少几个级34，其仅可切换到两个不同的状态，与级的状态相关联的双级输出被加在一起以导出总和响应 即信号源的逐步功能，装置109,122,121,126,125响应于信号源的值，用于导出分别指示所述状态之一中的级的数目是第一和第二命令141和142 响应于增加和减少所述状态的第一和第二状态中的级数的命令，使处于第一状态最长状态的级切换到第二状态的装置131,132响应 第二命令和处于第二状态最长的阶段响应于第一命令切换到第一状态，并且使所述阶段中的123个不同阶段成为 在第一状态中，不同的所述阶段在不同时间处于第二状态，即使源的值没有变化。 作为导出第一和第二命令的替代方案，可以导出应该处于所述状态中的第一状态中的阶段数量的第一指示121以及实际处于所述第一状态中的阶段数量的第二指示125，装置127 响应于控制每个所述级处于所述第一状态的时间长度的第一和第二指示的比较126以及所述第一状态中的所述级的数量，所述控制装置127包括用于存储与所述第一状态相对应的值的装置131 在一个状态中的阶段的数量，响应于指示第一指示超过第二指示并且第二指示超过第一指示的比较，由存储装置存储的值被改变。

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