公开(公告)号：EP1428313A4

公开(公告)日：2006-06-07

申请号：EP02759314

申请日：2002-08-12

Applicant: HARRIS CORP

Inventor： POGGI PETER JOHN ,  DITTMER TIMOTHY ,  CABRERA GEORGE

IPC: H03F1/02 ,  H03F3/21 ,  H03G3/00 ,  H03G3/30 ,  H03F3/04

CPC classification number: H03G3/3042 ,  H03F1/0222 ,  H03F1/0233 ,  H03F1/0244 ,  H03F1/0277 ,  H03F3/211 ,  H03G3/004 ,  H03G2201/103 ,  H03G2201/504 ,  H03G2201/508 ,  H03G2201/702

Abstract: The variable power supply (12) to an amplifier (10) in an electrical circuit is dynamically controlled through the use of a lookup table (14) responsive to one or more operating conditions of the electrical circuit. The lookup table is indexed by one or more of the operating conditions and the amount of amplification to be applied to an input signal to the amplifier is determined. One embodiment of the invention comprises a television transmitter circuit including a power amplifier circuit capable of amplifying a variable frequency COFDM or 8VSB input signal (11) where the amount of amplification applied to the input signal is dynamically controlled through the use of a lookup table as a function of the frequency of the input signal.

公开(公告)号：EP1653607A1

公开(公告)日：2006-05-03

申请号：EP03817770.5

申请日：2003-07-30

Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

Inventor： NOGAMI, Masamichi, c/o Mitsubishi Denki K.K. ,  NODA, Masaki, c/o Mitsubishi Denki K.K. ,  TAGAMI, Hitoyuki, c/o Mitsubishi Denki K.K. ,  MOTOSHIMA, Kuniaki, c/o Mitsubishi Denki K.K.

IPC: H03G3/20 ,  H03F3/08 ,  H04B10/06

CPC classification number: H03G3/3084 ,  H03F3/08 ,  H03G1/0047 ,  H03G2201/103 ,  H03G2201/502 ,  H04B10/69

Abstract: A gain switching circuit (3) that switches a conversion gain of a preamp (2), which outputs a voltage signal upon amplifying an output current of a photo-detecting element (1) that converts a burst-form optical signal into an electrical signal and with which a series circuit, formed with a first resistor (6) and a first switching element (9), and a series circuit, formed with a second resistor (7) and a second switching element (10), are connected in parallel to a feedback resistor (2B), generates an operating signal for closing the first switching element (9) within a first gain switching period and generates an operating signal for closing the second switching element (10) within a second gain switching period.

Abstract translation: 一种增益切换电路（3），其切换前置放大器（2）的转换增益，该放大器（2）的转换增益在放大光电检测元件（1）的输出电流时输出，该光检测元件将突发形式的光信号转换为电信号 与第一电阻器（6）和第一开关元件（9）形成的串联电路和形成有第二电阻器（7）和第二开关元件（10）的串联电路并联连接 到反馈电阻器（2B），产生用于在第一增益切换周期内闭合第一开关元件（9）的操作信号，并产生用于在第一增益切换周期内关闭第二开关元件（10）的操作信号

公开(公告)号：EP1583232A2

公开(公告)日：2005-10-05

申请号：EP05090077.8

申请日：2005-03-29

Applicant: NEC CORPORATION

Inventor： Ishihara, Takeshi, c/o NEC Corporation

IPC: H03G3/30

CPC classification number: H04W52/22 ,  H03G3/3068 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/702 ,  H03M1/122 ,  H03M1/18 ,  H03M1/183

Abstract: An automatic gain control device includes an amplifier for a reception signal, a signal processing unit, a memory, and a control unit. The amplifier can set a gain. The signal processing unit extracts control data from an output from the amplifier and performs information processing for the data. The memory stores the gain setting value of the amplifier. The control unit controls the gain of the amplifier in accordance with a preset control algorithm. On the basis of the result obtained when the control unit computes a gain setting value stored in the memory in accordance with a preset algorithm, the control unit controls the gain of the amplifier in correspondence with operation of switching the frequency of a reception signal, which is accompanied by different frequency monitoring in the compressed mode by the signal processing unit. A radio communication terminal, a control method for an automatic gain control device, a control program for an automatic gain control device, an automatic gain control method, a radio communication system, and a radio communication method are also disclosed.

公开(公告)号：EP2161833B1

公开(公告)日：2011-11-30

申请号：EP09009347.7

申请日：2003-07-30

Applicant: Mitsubishi Denki Kabushiki Kaisha

Inventor： Nogami, Masamichi ,  Noda, Masaki ,  Tagami, Hitoyuki ,  Motoshima, Kuniaki

IPC: H03G3/30 ,  H03G1/00

CPC classification number: H03G3/3084 ,  H03F3/08 ,  H03G1/0047 ,  H03G2201/103 ,  H03G2201/502 ,  H04B10/69

公开(公告)号：EP1583232B1

公开(公告)日：2010-06-02

申请号：EP05090077.8

申请日：2005-03-29

Applicant: NEC CORPORATION

Inventor： Ishihara, Takeshi, c/o NEC Corporation

IPC: H03G3/30 ,  H04B7/005

CPC classification number: H04W52/22 ,  H03G3/3068 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/702 ,  H03M1/122 ,  H03M1/18 ,  H03M1/183

公开(公告)号：EP2161833A1

公开(公告)日：2010-03-10

申请号：EP09009347.7

申请日：2003-07-30

Applicant: Mitsubishi Denki Kabushiki Kaisha

Inventor： Nogami, Masamichi ,  Noda, Masaki ,  Tagami, Hitoyuki ,  Motoshima, Kuniaki

IPC: H03G3/30 ,  H03G1/00

CPC classification number: H03G3/3084 ,  H03F3/08 ,  H03G1/0047 ,  H03G2201/103 ,  H03G2201/502 ,  H04B10/69

Abstract: A gain switching circuit (3) that switches a conversion gain of a preamp (2) , which outputs a voltage signal upon amplifying an output current of a photo-detecting element (1) that converts a burst-form optical signal into an electrical signal and with which a series circuit, formed with a first resistor (6) and a first switching element (9) , and a series circuit, formed with a second resistor (7) and a second switching element (10) are connected in parallel to a feedback resistor (2B). The switching circuit further includes a gate signal generating circuit that generates, upon receiving an output of the pre-amplifier, a gate signal for a first and second operating unit.

Abstract translation: 一种增益切换电路（3），其切换前置放大器（2）的转换增益，该放大器（2）的转换增益在放大光电检测元件（1）的输出电流时输出，该光检测元件将突发形式的光信号转换为电信号 与第一电阻器（6）和第一开关元件（9）形成的串联电路和形成有第二电阻器（7）和第二开关元件（10）的串联电路并联连接到 反馈电阻器（2B）。 开关电路还包括门信号发生电路，其在接收到前置放大器的输出时产生用于第一和第二操作单元的门信号。

公开(公告)号：EP1653607B1

公开(公告)日：2009-10-07

申请号：EP03817770.5

申请日：2003-07-30

Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

Inventor： NOGAMI, Masamichi, c/o Mitsubishi Denki K.K. ,  NODA, Masaki, c/o Mitsubishi Denki K.K. ,  TAGAMI, Hitoyuki, c/o Mitsubishi Denki K.K. ,  MOTOSHIMA, Kuniaki, c/o Mitsubishi Denki K.K.

IPC: H03G3/20 ,  H03F3/08 ,  H04B10/06

CPC classification number: H03G3/3084 ,  H03F3/08 ,  H03G1/0047 ,  H03G2201/103 ,  H03G2201/502 ,  H04B10/69

公开(公告)号：EP1698051A1

公开(公告)日：2006-09-06

申请号：EP04805495.1

申请日：2004-11-19

Applicant: Wavecom

Inventor： FRON, Grégory

IPC: H03G3/30 ,  H03G3/20 ,  H03F1/30 ,  H03F3/19 ,  H03F1/52 ,  H03F3/189

CPC classification number: H03G3/3047 ,  H03F1/30 ,  H03F1/52 ,  H03F3/189 ,  H03F3/19 ,  H03F2200/465 ,  H03F2200/78 ,  H03G3/004 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40

Abstract: The invention relates to a radio frequency (RF) and/or microwave power amplification device which is intended, for example, for a radio communication terminal, comprising means for shielding the device and means for controlling the power delivered as output from said device, said power-control means comprising a power servo loop having power-amplification means, reference means, detection means and comparison means. According to the invention, the aforementioned control means also comprise at least one sensor to detect the energy radiated inside the device.

公开(公告)号：EP1650890A4

公开(公告)日：2006-08-23

申请号：EP03817647

申请日：2003-07-25

Applicant: FUJITSU LTD

Inventor： SATO TADAHIRO ,  ADACHI AKIFUMI

IPC: H04B17/40 ,  H04J3/00 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30 ,  H04B1/16 ,  H04B1/707 ,  H04B7/005 ,  H04J11/00 ,  H04J13/00

CPC classification number: H03G3/3052 ,  H03G3/005 ,  H03G3/3078 ,  H03G3/3089 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/305 ,  H04B1/707 ,  H04B2201/70701 ,  H04B2201/70706

Abstract: A received frame is branched into a gain control system (20A) for common pilot signals and a gain control system (20B) for individual data signals. The gain control system (20A) controls the gain of the common pilot signals, and the gain control system (20B) controls the gain of the data signals. A signal processor (30) establishes synchronization of frames, outputs a gain control signal (g1) so that the gain of the common pilot signal is constant, to a gain control circuit (21a) for the common pilot signals, and outputs a gain control signal (g2) so that the gain of the data signal is constant, to a gain control circuit (21b) for the data signals. The gain is controlled to be constant, thereby preventing saturation of ADC (26a, 26b, 27a, 27b) and S/N deterioration.

Abstract translation: 接收到的帧被分支到公共导频信号增益控制系统（20A）和单独的数据信号增益控制系统（20B）。 当增益控制系统（20B）增益控制数据信号的增益时，增益控制系统（20A）增益控制公共导频信号的增益。 信号处理器（30）执行与帧的同步，向公共导频信号增益控制电路（21a）输出用于使公共导频信号的增益恒定的增益控制信号（g1），并输出增益控制信号（g2） ），用于使数据信号的增益恒定到数据信号增益控制电路（21b）。 由于增益被控制为恒定，所以可以防止ADC（26a，26b，27a，27b）的饱和和S / N劣化。

公开(公告)号：EP1568192A4

公开(公告)日：2006-08-23

申请号：EP03783365

申请日：2003-11-14

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FATIH ,  KAZAKEVICH LEONID ,  HAQUE TANBIR ,  DEMIR ALPASLAN ,  NARAYAN GEETHA LAKSHMI ,  KEARNEY KENNETH

IPC: H03D3/00 ,  H03C3/40 ,  H03G3/00 ,  H03G3/30 ,  H04B1/30 ,  H04L27/00

CPC classification number: H03G3/001 ,  H03D3/008 ,  H03D3/009 ,  H03G3/3068 ,  H03G3/3089 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/307 ,  H03G2201/508 ,  H04B1/30 ,  H04L2027/0016 ,  H04L2027/0024

Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component (105) tolerances of an analog radio (100), a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (110) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency parameters.