公开(公告)号：EP2018706B1

公开(公告)日：2013-09-04

申请号：EP07797416.0

申请日：2007-05-10

申请人： Qualcomm Incorporated

发明人： CICCARELLI, Steven C. ,  GEORGE, Brian ,  LAU, Soon-seng

IPC分类号： H04B1/10

CPC分类号： H04B1/109 ,  H03F3/72 ,  H03F2200/294 ,  H03F2203/7231 ,  H04K3/224 ,  H04W52/0238 ,  Y02D70/1222 ,  Y02D70/40

摘要： Techniques for operating a receiver to linearity performance and higher receive signal to noise ratio are described. The receiver includes one or more circuit blocks, e.g., a low noise amplifier (LNA), having discrete gain states. The gain states are selected based on switch points, with each switch point indicating a specific received signal level at which to switch from one gain state to another gain state. The switch points may be dynamically selected based on channel conditions, which may be characterized by the presence or absence or strength or frequency of jammers. A first set of switch points may be selected when jammers are detected, and a second set of switch points may be selected when jammers are not detected. The gain states are selected in accordance with the set of switch points selected for use.

公开(公告)号：EP1928087A1

公开(公告)日：2008-06-04

申请号：EP07020764.2

申请日：2007-10-24

申请人： Mitsumi Electric Co., Ltd.

发明人： Dobashi, Nagayoshi Mitsumi Electric Co.,Ltd. ,  Mabuchi, Shigeki Mitsumi Electric Co.,Ltd.

IPC分类号： H03G1/00 ,  H03F3/45 ,  H03F3/72

CPC分类号： H03G1/0023 ,  H03F3/45085 ,  H03F3/45475 ,  H03F3/72 ,  H03F2203/45138 ,  H03F2203/45506 ,  H03F2203/45528 ,  H03F2203/45652 ,  H03F2203/7231 ,  H03G1/0088

摘要： A variable gain amplifier circuit comprises a plurality of differential circuits (22,24,26,28), each differential circuit having two input terminals and one output terminal. One of the input terminals of each amplifier is connected to a common input terminal (21) to input a signal to each of the differential circuits. Any one of the differential circuits may be selected by a switch to operate. The variable amplifier further comprises an output circuit (30) whose input terminal is connected to the output of each of the plural differential circuits, the output terminal (50) of the output circuit is connected to a series of resistors (R11,R12,R13,R14), the last resistor being connected to a reference voltage (Vref). Each of the junctions of two resistors is connected to the other one of said input terminals of said differential circuits.

摘要翻译： 可变增益放大器电路包括多个差分电路（22,24,26,28），每个差分电路具有两个输入端和一个输出端。 每个放大器的一个输入端子连接到公共输入端子（21），以将信号输入到每个差分电路。 可以通过开关来选择差分电路中的任何一个来操作。 可变放大器还包括输入端（30），其输入端连接到多个差分电路中的每一个的输出端，输出电路的输出端（50）连接到一系列电阻（R11，R12，R13 ，R14），最后一个电阻器连接到参考电压（Vref）。 两个电阻器的每个结点连接到所述差分电路的另一个所述输入端子。

公开(公告)号：EP1798856A1

公开(公告)日：2007-06-20

申请号：EP07004546.3

申请日：1999-09-22

申请人： QUALCOMM INCORPORATED

发明人： Kaufman, Ralph ,  Hunzeker, Darin ,  Camarillo, Richard, J.

IPC分类号： H03F3/72

CPC分类号： H03F3/72 ,  H03F3/602 ,  H03F2203/7231 ,  H03F2203/7239 ,  H03G1/0088

摘要： A power amplifier arrangement comprises a power amplifier (32), an output circulator (55), a bypass path (30) and switches (20,43) for selecting either the power amplifier path or the bypass path. The arrangement comprises furthermore a resistor (45). If the power amplifier path is selected, the resistor (45) absorbs signals originating from the output (54), e.g. due to load mismatch. If the bypass path is selected, the power amplifier (32) provides a high output impedance to the circulator (55) in order to reflect the signal which is applied to the circulator through the bypass path. SAXD.

摘要翻译： 功率放大器装置包括功率放大器（32），输出循环器（55），旁路路径（30）和用于选择功率放大器路径或旁路路径的开关（20,43）。 该装置还包括电阻器（45）。 如果选择功率放大器路径，则电阻器（45）吸收源自输出端（54）的信号，例如， 由于负载不匹配。 如果选择了旁通路径，功率放大器（32）向环行器（55）提供高输出阻抗，以便反射通过旁通路径施加到循环器的信号。 SAXD。

公开(公告)号：EP2541759A4

公开(公告)日：2014-10-29

申请号：EP11842465

申请日：2011-10-27

申请人： ZTE CORP

发明人： CHEN HUAZHANG ,  LIU JIAMLI ,  CUI XIAOJUN

IPC分类号： H03F1/02 ,  H03F3/195 ,  H03F3/24 ,  H03F3/72

CPC分类号： H03F1/0288 ,  H03F1/0277 ,  H03F3/195 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/405 ,  H03F2203/7215 ,  H03F2203/7231

摘要： The present invention discloses a Doherty power amplifier and an implementation method thereof. The Doherty power amplifier includes a carrier power amplifier circuit and a peak power amplifier circuit, wherein, the peak amplifier circuit is configured with a Radio Frequency (RF) switch for controlling turn-on of peak power amplifiers in the peak amplifier circuit; and a part or all of carrier power amplifiers in the carrier power amplifier circuit use GaN devices, and a part or all of the peak power amplifiers in the peak power amplifier circuit use LDMOS devices. The present invention avoids a defect of a peak branch in the Doherty power amplifier from being turned on ahead of time, thus reducing the power consumption of the peak power amplifier; and meanwhile, since the power consumption of the carrier power amplifiers in the Doherty power amplifier account for most of the power consumption, and the efficiency of the carrier power amplifiers using GaN devices is much higher than that of the carrier power amplifiers using LDMOS devices, the efficiency of the whole power amplifier is greatly enhanced.

公开(公告)号：EP2475096A1

公开(公告)日：2012-07-11

申请号：EP10811186.5

申请日：2010-06-23

申请人： Huawei Device Co., Ltd.

发明人： WANG, Hai

IPC分类号： H03F3/20

CPC分类号： H03F3/245 ,  H03F1/0261 ,  H03F1/56 ,  H03F3/189 ,  H03F3/22 ,  H03F3/72 ,  H03F2200/18 ,  H03F2200/222 ,  H03F2200/27 ,  H03F2200/318 ,  H03F2200/387 ,  H03F2200/411 ,  H03F2203/7206 ,  H03F2203/7231

摘要： A Power Amplifier (PA) apparatus is provided. The PA apparatus includes: a first stage PA tube, configured to amplify gain of input signals; a first stage bias circuit connected to the first stage PA tube, configured to provide bias voltage for the first stage PA tube; a second stage PA tube connected to the first stage PA tube, configured to amplify gain of output signals of the first stage PA tube; a second stage bias circuit connected to the second stage PA tube, configured to provide bias voltage for the second stage PA tube; a reference voltage unit connected to the first stage bias circuit and the second stage bias circuit; and a voltage control unit connected to the first stage bias circuit and the second stage bias circuit, configured to connect and disconnect the first stage PA tube through the first stage bias circuit, and connect and disconnect the second stage PA tube through the second stage bias circuit. A receiving apparatus of a User Equipment (UE) is also provided. The receiving apparatus simplifies the structure of the PA apparatus, thereby reducing the production cost and improving the stability of the gain procedure.

摘要翻译： 功率放大器（PA）设备被提供。 该PA设备包括：第一级PA管，用于放大输入信号的增益; 第一级偏置电路，连接到第一级PA管，被配置为为第一级PA管提供偏置电压; 第二级PA管，连接所述第一级PA管，用于放大所述第一级PA管的输出信号的增益; 连接到第二级PA管的第二级偏置电路，被配置为为第二级PA管提供偏置电压; 与第一级偏置电路和第二级偏置电路连接的参考电压单元; 以及电压控制单元，连接到第一级偏置电路和第二级偏置电路，被配置为通过第一级偏置电路连接和断开第一级PA管，并且通过第二级偏置来连接和断开第二级PA管 电路。 还提供了用户设备（UE）的接收装置。 接收装置简化了PA装置的结构，从而降低了生产成本并提高了增益过程的稳定性。

公开(公告)号：EP2449674A1

公开(公告)日：2012-05-09

申请号：EP10734983.9

申请日：2010-07-16

申请人： Cambridge Silicon Radio Limited

发明人： CERCELARU, Sever

IPC分类号： H03F1/22 ,  H03F3/195 ,  H03F3/24 ,  H03F3/72 ,  H04B1/44

CPC分类号： H03F3/72 ,  H03F3/195 ,  H03F3/245 ,  H03F2200/09 ,  H03F2200/18 ,  H03F2200/216 ,  H03F2200/24 ,  H03F2200/27 ,  H03F2200/294 ,  H03F2200/378 ,  H03F2200/391 ,  H03F2200/399 ,  H03F2200/411 ,  H03F2200/451 ,  H03F2200/72 ,  H03F2203/7206 ,  H03F2203/7231

摘要： A circuit for amplifying radio frequency signals comprising: a terminal for connection to an antenna; a common amplifier arranged in a common-gate configuration between a first node and said terminal; a transmit amplifier operable to amplify a radio frequency signal present at an input node and provide the amplified signal to said first node; and a receive amplifier operable to amplify a radio frequency signal present at said first node and provide the amplified signal to an output node; wherein the circuit is operable in two modes: in a receive mode, the common and receive amplifiers being configured so as to together form a receive cascode for amplifying radio frequency signals received at the terminal; and in a transmit mode, the common and transmit amplifiers being configured so as to together form a transmit cascode for amplifying radio frequency signals applied at the input node.

公开(公告)号：EP2340612A1

公开(公告)日：2011-07-06

申请号：EP09767874.2

申请日：2009-06-19

申请人： QUALCOMM Incorporated

发明人： NARATHONG, Chiewcharn ,  ANIRUDDHAN, Sankaran ,  SU, Wenjun

IPC分类号： H03F1/30 ,  H03F1/32 ,  H03F3/24

CPC分类号： H03F1/3276 ,  H03F1/301 ,  H03F1/308 ,  H03F1/3241 ,  H03F3/245 ,  H03F3/3022 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2200/453 ,  H03F2203/30099 ,  H03F2203/30132 ,  H03F2203/7231

摘要： Techniques are disclosed for extending an amplifier's linear operating range by concatenating an amplifier exhibiting gain compression with a gain expansion stage. In an exemplary embodiment, a gain expansion stage incorporates a Class-B stage, a Class-AB stage, or a combination of the two. In an exemplary embodiment, both the gain compression stage and gain expansion stage are provided with a replica current biasing scheme to ensure stable biasing current over variations in temperature, process, and/or supply voltage. Further disclosed is an output voltage biasing scheme to set the DC output voltage to ensure maximum linear operating range.

公开(公告)号：EP1618694A2

公开(公告)日：2006-01-25

申请号：EP04751168.8

申请日：2004-04-29

申请人： Mediacell Licensing Corporation

发明人： BISHOP, Donald, M.

IPC分类号： H04L1/00

CPC分类号： H04B3/36 ,  G01S1/00 ,  H03F3/72 ,  H03F2203/7231 ,  H03F2203/7239 ,  H04B1/74 ,  H04B1/745 ,  H04B3/542 ,  H04B2203/5445 ,  H04B2203/5483 ,  H04H20/78 ,  H04N7/104 ,  H04N7/17309 ,  H04N21/6118 ,  H04N21/6168

摘要： A system and method for a distribution network is provided wherein cascaded power amplifiers with bypass switching (200) are disposed along the branches of the network. The amplifiers (200) may have an RF modem (522) and a programmable digital computer (524) that enables communication with a headend (102) or a controlling computer as well as a bypass switch control for disabling the amplification function of the amplifiers (200). The amplifier (200) may have a wireless communication system for communicating with individual subscriber's homes and communicating with a neighboring amplifier system for use in emergency situations or during installation and configuration of the network. The network comprised of the amplifiers (200) may have redundant signal paths, using the wireless communication devices of the amplifiers (200), which may be used as backup signal paths for certain communications requiring high uptime such as telephony.

公开(公告)号：EP2541759A1

公开(公告)日：2013-01-02

申请号：EP11842465.4

申请日：2011-10-27

申请人： ZTE Corporation

发明人： CHEN, Huazhang ,  LIU, Jiamli ,  CUI, Xiaojun

IPC分类号： H03F1/02

CPC分类号： H03F1/0288 ,  H03F1/0277 ,  H03F3/195 ,  H03F3/245 ,  H03F3/72 ,  H03F2200/405 ,  H03F2203/7215 ,  H03F2203/7231

摘要： The present invention discloses a Doherty power amplifier and an implementation method thereof. The Doherty power amplifier includes a carrier power amplifier circuit and a peak power amplifier circuit, wherein, the peak amplifier circuit is configured with a Radio Frequency (RF) switch for controlling turn-on of peak power amplifiers in the peak amplifier circuit; and a part or all of carrier power amplifiers in the carrier power amplifier circuit use GaN devices, and a part or all of the peak power amplifiers in the peak power amplifier circuit use LDMOS devices. The present invention avoids a defect of a peak branch in the Doherty power amplifier from being turned on ahead of time, thus reducing the power consumption of the peak power amplifier; and meanwhile, since the power consumption of the carrier power amplifiers in the Doherty power amplifier account for most of the power consumption, and the efficiency of the carrier power amplifiers using GaN devices is much higher than that of the carrier power amplifiers using LDMOS devices, the efficiency of the whole power amplifier is greatly enhanced.

摘要翻译： 本发明公开了一种Doherty功率放大器及其实现方法。 多赫蒂功率放大器包括载波功率放大器电路和峰值功率放大器电路，其中峰值放大器电路配置有射频（RF）开关，用于控制峰值放大器电路中的峰值功率放大器的导通; 并且载波功率放大器电路中的载波功率放大器的一部分或全部使用GaN器件，并且峰值功率放大器电路中的部分或全部峰值功率放大器使用LDMOS器件。 本发明避免了Doherty功率放大器中的峰值分支的缺陷，提前导通，从而降低了峰值功率放大器的功耗; 同时由于Doherty功率放大器的功耗占能耗大部分，而使用GaN器件的载波功率放大器的效率远高于使用LDMOS器件的载波功率放大器的功耗， 整个功率放大器的效率大大提高。

公开(公告)号：EP2110954A3

公开(公告)日：2011-05-18

申请号：EP09004816.6

申请日：2009-04-01

申请人： Atmel Automotive GmbH

发明人： Ferchland, Tilo, Dipl.-Ing. ,  Beyer, Sascha, Dipl.-Ing. ,  Kluge, Wolfram, Dr.-Ing.

IPC分类号： H04B1/04 ,  H03F3/19

CPC分类号： H03F3/245 ,  H03F3/19 ,  H03F3/72 ,  H03F2200/321 ,  H03F2200/366 ,  H03F2203/7231 ,  H03F2203/7236 ,  H04B1/04

摘要： Verfahren zum Senden, Verwendung eines Leistungsverstärkers und Sendeschaltung eines Funknetzes
- mit einem Leistungsverstärker (100), der mit einer Antenne (1) verbindbar ist,
- mit einem Zähler (200), dessen Ausgang (211, 212, 213, 214) mit einem Steuereingang (101, 102, 103, 104) des Leistungsverstärkers (100) zur Ausgabe eines Zählwerts (n) zur Steuerung der Verstärkung des Leistungsverstärkers (100) verbunden ist,
- mit einem Register (400) zur Speicherung eines Registerwerts (reg),
- mit einem Vergleicher (300), dessen Eingänge (311, 312, 313, 314, 321, 322, 323, 324) mit dem Ausgang (211, 212, 213, 214) des Zählers (200) und dem Register (400) zum Vergleich des Registerwerts (reg) mit dem Zählwert (n) verbunden sind,
- mit einem Kontrollschaltkreis (500), dessen Eingang (501) mit dem Vergleicher (300) und dessen Ausgang (502, 503, 504) mit dem Zähler (200) zur Steuerung eines Zählvorgangs in Abhängigkeit vom Vergleichsergebnis des Vergleichers (300) verbunden sind.