公开(公告)号：EP2404383A2

公开(公告)日：2012-01-11

申请号：EP10748983.3

申请日：2010-03-05

Applicant: Samsung Electronics Co., Ltd. ,  Postech Academy-industry Foundation

Inventor： ZEONG, Jong-Wook ,  PARK, Han-Gue ,  KIM, Bum-Man ,  LEE, jae-Sup ,  CHOI, Jin-Sung

IPC: H04B1/04

CPC classification number: H04B1/0483 ,  H03F1/02 ,  H03F1/0211 ,  H03F1/0261 ,  H03F1/3205 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/324 ,  H03F2200/435 ,  H04B2001/045

Abstract: Improvement of linearity of a transmitter is provided, by a transmission method that includes, when receiving a transmit signal, generating, at a modulation signal generator, a modulation signal modulated from the transmit signal, an average output level and an amplitude with respect to the modulation signal; receiving, at a Read Only Memory (ROM), the average output level and generating a peak amplitude; and generating, at an amplitude shaper, a gain value using the peak amplitude and the amplitude and generating magnitude information by adding an offset value.

Abstract translation: 通过这样的传输方法来提供发送器的线性度的改善，该传输方法包括：当接收到发送信号时，在调制信号发生器处生成从发送信号调制的调制信号，平均输出电平和相对于 调制信号; 在只读存储器（ROM）处接收平均输出电平并产生峰值幅度; 并且在幅度整形器中使用峰值幅度和幅度来生成增益值，并且通过添加偏移值来生成幅度信息。

公开(公告)号：EP1484840B1

公开(公告)日：2011-03-02

申请号：EP04007357.9

申请日：2004-03-26

Applicant: Broadcom Corporation

Inventor： Behzad, Arya ,  Lin, Li

IPC: H03G1/00

CPC classification number: H03F1/223 ,  H03F1/3205 ,  H03F3/19 ,  H03F3/45188 ,  H03F2200/366 ,  H03F2200/451 ,  H03G1/0088 ,  H03G3/001

公开(公告)号：EP1378057B1

公开(公告)日：2010-04-21

申请号：EP01991079.3

申请日：2001-12-13

Applicant: Panasonic Corporation

Inventor： SANDER, Wendell, B.

IPC: H03F1/02 ,  H03F1/32

CPC classification number: H03F1/34 ,  H03F1/32 ,  H03F1/3205

公开(公告)号：EP1783896A2

公开(公告)日：2007-05-09

申请号：EP06123459.7

申请日：2006-11-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lee, Jong-Sung

IPC: H03F1/30 ,  H03F1/32 ,  H03F3/24 ,  H03F3/189

CPC classification number: H03F1/0266 ,  H03F1/301 ,  H03F1/3205 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/18 ,  H03F2200/192 ,  H03F2200/451 ,  H03F2200/471

Abstract: Disclosed is an apparatus for maintaining the linearity of a Radio Frequency amplifier that includes a coupler (203) for coupling a signal input to a power amplifier (201), a gate bias controller (205) for determining a gate bias voltage in accordance with the signal level, and a power amplifier (201) for amplifying the input signal with the input signal maintained using the gate bias voltage received from the gate bias controller (205), making possible improved linearity of power amplifier output in an entire output region and increased Inter Modulation Distortion (IMD) cancellation when a pre-distorter is used. Since the linearity characteristic of the power amplifier is optimized despite reduction in output signal level of the power amplifier, it is possible to use one power amplifier for a single Frequency Allocation (FA) condition of a high output and a multi FA condition of a low output.

Abstract translation: 公开了一种用于维护一射频放大器的线性度做了一个装置包括：用于在雅舞的信号输入耦合到功率放大器（201），栅极偏压控制器（205），用于确定的采矿的栅极偏置电压的耦合器（203） 信号电平，并用于与输入信号放大所述输入信号的功率放大器（201）使用从栅极偏压控制器（205）接收到的栅极偏压电压保持在NOM区域使得功率放大器的输出的可能的改善的线性和中增加 互调失真（IMD）消除当使用预失真器。 由于功率放大器的线性特性，尽管降低在功率放大器的输出信号电平进行优化，有可能使用一个功率放大器用于单个频率分配的高输出的（FA）条件和低的多FA条件 输出。

公开(公告)号：EP0926818B1

公开(公告)日：2007-04-04

申请号：EP98403000.7

申请日：1998-11-30

Applicant: Radio Frequency Systems Inc.

Inventor： Helms, David R.

IPC: H03F3/193 ,  H03F1/32

CPC classification number: H03F3/193 ,  H03F1/3205

公开(公告)号：EP1578011B1

公开(公告)日：2007-02-07

申请号：EP03811495.5

申请日：2003-11-06

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

Inventor： ISHII, Takuya ,  IKEDA, Masaharu ,  AKASHI, Hiroki

IPC: H03F3/217

CPC classification number: H03F3/2173 ,  H03F1/0211 ,  H03F1/3205 ,  H03F2200/331

Abstract: A power amplifying apparatus of switching type for performing, with a high degree of efficiency, a power amplification of input AC signals, such as an acoustic signal and the like, has first (11) and second (12) switch circuits to which a power supply voltage (Vc) is supplied; an inductor (13) and a load (14) that are connected between those switch circuits; and a control circuit (15) that receives an input AC signal (Vi), sets a predetermined ratio of ON interval to OFF interval, and drives the switch circuits. The control circuit (15) includes a calculating circuit (20) that multiplies a modulation sensitivity (e.g., the amplitude of a triangular wave voltage during production of a pulse signal for driving the switch circuits) by a ratio of the power supply voltage (Vc) to a DC component (Ec) thereof (Vc/Ec), and then outputs the resultant amplified value. This configuration compensates for distortion due to a ripple variation of the power supply voltage caused by a regenerative power or the like, and allows an adjustment of amplification factor by use of the power supply voltage.

公开(公告)号：EP0920123B1

公开(公告)日：2006-11-02

申请号：EP98122434.8

申请日：1998-11-26

Applicant: NEC Electronics Corporation

Inventor： Kakuta, Yuji, c/o NEC Corporation ,  Fukasawa, Yoshiaki, c/o NEC Corporation ,  Taguchi, Yuichi, c/o NEC Engineering, Ltd.

IPC: H03F1/30

CPC classification number: H03F1/3205 ,  H03F1/301 ,  H03F2200/18 ,  H03F2200/447

公开(公告)号：EP1578011A1

公开(公告)日：2005-09-21

申请号：EP03811495.5

申请日：2003-11-06

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

Inventor： ISHII, Takuya ,  IKEDA, Masaharu ,  AKASHI, Hiroki

IPC: H03F3/217

CPC classification number: H03F3/2173 ,  H03F1/0211 ,  H03F1/3205 ,  H03F2200/331

Abstract: A power amplifying apparatus which is of a switching type and capable of efficiently amplifying a power of an input AC signal such as an acoustic signal, includes a first switch circuit (11) and a second switch circuit (12) to which a power supply voltage Vc is applied, an inductor (13) and a load (14) which are connected between the switch circuits, and a control circuit (15) which receives an input AC signal Vi, sets a predetermined ratio of ON/OFF periods, and drives the switch circuits. The control circuit (15) includes an arithmetic circuit (20) which multiplies a modulation sensitivity (for example, an amplitude of a triangular wave voltage used for generation of a pulse signal for driving a switch circuit) by a ratio (Vc/Ec) of the power supply voltage Vc and a DC component Ec thereof. This configuration can compensate for distortion caused by a ripple variation of the power supply voltage due to regenerated power or the like, and enable a gain control by the power supply voltage.

公开(公告)号：EP1573908A1

公开(公告)日：2005-09-14

申请号：EP03768732.4

申请日：2003-11-04

Applicant: Cree Microwave, Inc.

Inventor： PENGELLY, Raymond, S. ,  WOOD, Simon, M. ,  QUINN, John, P.

IPC: H03F3/68

CPC classification number: H03F3/602 ,  H03F1/3205 ,  H03F3/211

Abstract: The linearity of a transistor amplifier comprising a plurality of transistors operating parallel is improved by reducing the odd order transconductance derivatives of signals generated by the transistors. The transistors can be provided in groups with each group having a different bias voltage applied thereto or each group of transistors can have a different input signal applied thereto. The groups of transistors can have different physical parameters suchas the width to length ratio of gates in field effect transistors and threshold voltages for the transistors.

公开(公告)号：EP1523804A2

公开(公告)日：2005-04-20

申请号：EP02768983.5

申请日：2002-10-04

Applicant: Freescale Semiconductor, Inc.

Inventor： CONNELL, Lawrence, E. ,  HOLLENBECK, Neal, W.

IPC: H03F3/04

CPC classification number: H03F1/3205 ,  H03F1/301 ,  H03F3/19 ,  H03F2200/72 ,  H03G1/0023

Abstract: A high-gain wide-band RF amplifier (120) with automatic bias supply regulation. Amplifier (120) includes a pair of field effect transistors (FETs) (102, 104) with common source connection (106) biased by FET (108) connected between common source connection (106) and amplifier signal input RFIN. Bias voltage 'VB1' is applied to the gate of device (108) and automatic gain control voltage 'VAGC' is applied to the gates of FET pair (102, 104). Automatic bias supply circuit (122) is an active load including resistors (124, 126), capacitor (128) and amplifier (130). Capacitor (128) is connected between the negative input (132) and output (134) of amplifier (130). Load reference voltage (VO) is provided to the positive input. Resistor (124) is connected between output (134) of amplifier (130) and the amplifier output (136) at the drain of FET (104). Resistor (126) is connected between output (136) at the drain of FET (104) and the negative input (132) to amplifier (130) providing amplifier load signal feedback.