JP2011142696A - ポーラフィードバックを備える線形rf増幅器 - Google Patents
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- H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
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- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
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- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
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- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3294—Acting on the real and imaginary components of the input signal
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- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
- H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
- H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
- H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/321—Use of a microprocessor in an amplifier circuit or its control circuit
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- H—ELECTRICITY
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- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/324—An amplitude modulator or demodulator being used in the amplifier circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/333—A frequency modulator or demodulator being used in the amplifier circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/393—A measuring circuit being coupled to the output of an amplifier
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- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/78—A comparator being used in a controlling circuit of an amplifier
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Abstract
【解決手段】RF信号の電力増幅のためのシステム100はポーラフィードバック制御を有する。システムは、フィードバック補正をされた制御信号に基づいてRF信号を変調するよう構成されるフィードバック制御型変調器110を有する。変調器110は、更に、変調RF信号を生成するよう構成される。システムは、また、フィードバック位相制御信号に基づいて変調RF信号の位相を補正するよう構成される位相シフタと、変調器及び/又は位相シフタと通信を行う電力増幅器112とを有する。増幅器112は、変調RF信号を増幅して増幅RF出力信号を生成するよう構成される。システムは、また、フィードバック補正をされた制御信号及び/又はフィードバック位相制御信号を含むポーラフィードバック信号を生成するよう構成されるフィードバックネットワーク116を有する。
【選択図】図1
Description
Claims (13)
- 元の波形の少なくとも位相成分を表す部分的に変調をされた無線周波数(RF)信号の電力増幅のためのシステムであって、
フィードバック補正をされた制御信号に基づいて前記部分的に変調されたRF信号を変調して変調RF信号を生成するよう構成されるフィードバック制御型変調器と、
前記フィードバック制御型変調器に結合され、前記変調RF信号を増幅して増幅RF出力信号を生成するよう構成される電力増幅器と、
前記電力増幅器に結合され、前記増幅RF出力信号の振幅特性を検出して振幅フィードバック信号を生成するよう構成される振幅検出器と、
前記振幅検出器及び前記フィードバック制御型変調器に結合され、前記振幅フィードバック信号と前記元の波形の振幅成分との間の差に基づいて前記フィードバック補正をされた制御信号を生成するよう構成されるフィードバックネットワークと、
前記元の波形の少なくとも前記位相成分を表す一対のIQ信号に基づいてRFキャリア信号を変調して前記部分的に変調をされたRF信号を生成するよう構成されるIQ変調器と、
前記IQ変調器に結合され、前記部分的に変調をされたRF信号の位相特性に基づいて位相シフト信号を生成するよう構成される固定位相シフタと
を有するシステム。 - 前記フィードバック補正をされた制御信号は、フィードバック補正をされた振幅制御信号であり、
前記フィードバック制御型変調器は、前記フィードバック補正をされた振幅制御信号に基づいて前記部分的に変調をされたRF信号に振幅変調を行って完全変調RF信号を生成するよう構成される振幅変調器である、請求項1記載のシステム。 - 前記部分的に変調をされたRF信号は、位相変調をされたRF信号である、請求項2記載のシステム。
- 前記元の波形の位相成分に基づいてRFキャリア信号に位相変調を行って前記位相変調をされたRF信号を生成するよう構成される位相変調器を更に有する、請求項3記載のシステム。
- 前記位相変調器及び前記フィードバックネットワークに結合され、矩形形式で前記元の波形を受け取って該元の波形を前記位相成分及び前記振幅成分に変換するポーラ信号変換器を更に有する、請求項4記載のシステム。
- 前記元の波形の周波数成分に基づいてRFキャリア信号に周波数変調を行って前記部分的に変調をされたRF信号を生成するよう構成される周波数変調器を更に有する、請求項2記載のシステム。
- 前記周波数変調器及び前記フィードバックネットワークに結合され、矩形形式で前記元の波形を受け取って該元の波形を前記周波数成分及び前記振幅成分に変換する振幅−周波数信号変換器を更に有する、請求項6記載のシステム。
- 前記IQ変調器に結合され、前記元の波形の前記位相成分のみを表すように前記一対のIQ信号を正規化するよう構成されるデジタル信号プロセッサを更に有する、請求項2記載のシステム。
- 矩形形式で前記元の波形を受け取り、該元の波形を前記位相成分及び前記振幅成分に変換し、該振幅成分を前記フィードバックネットワークに供給するよう構成されるポーラ信号変換器と、
前記ポーラ信号変換器及び前記フィードバック制御型変調器に結合され、前記位相成分を前記一対のIQ信号に変換するよう構成される矩形信号変換器と
を更に有する、請求項2記載のシステム。 - 前記ポーラ信号変換器及び前記矩形信号変換器は、デジタル信号プロセッサに実装される、請求項9記載のシステム。
- 前記振幅変調器に結合され、前記元の波形の位相成分に基づいて前記位相変調をされたRF信号を生成するよう構成される直接デジタルシンセサイザを更に有する、請求項3記載のシステム。
- 前記フィードバック補正をされた制御信号は、一対のフィードバック補正をされた制御信号を有し、
前記フィードバック制御型変調器はIQ変調器であり、
前記フィードバックネットワークは、
(i)前記元の波形の少なくとも前記位相成分を表す前記一対のIQ信号と、
(ii)前記振幅フィードバック信号と前記元の波形の振幅成分との間の前記差と
に基づいて前記一対のフィードバック補正をされた制御信号を生成するよう構成される一対のアナログ乗算器を有する、請求項1記載のシステム。 - 前記振幅検出器は、前記電力増幅器及び前記固定位相シフタに結合されるIQ復調器を更に有し、
前記IQ復調器は、前記位相シフト信号を受信して前記位相変調をされたRF信号と同相で発振するよう構成される局部発振器を有し、
前記振幅フィードバック信号は、前記増幅RF出力信号に基づいて前記IQ復調器によって生成される同相成分信号を有する、請求項1記載のシステム。
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US11/801,444 | 2007-05-10 | ||
US11/801,444 US7890067B2 (en) | 2007-05-10 | 2007-05-10 | Linear RF amplifier with polar feedback |
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JP2010507455A Division JP2010527202A (ja) | 2007-05-10 | 2008-05-08 | ポーラフィードバックを備える線形rf増幅器 |
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JP2011096736A Active JP5248651B2 (ja) | 2007-05-10 | 2011-04-25 | ポーラフィードバックを備える線形rf増幅器 |
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US (1) | US7890067B2 (ja) |
EP (1) | EP2151047B8 (ja) |
JP (2) | JP2010527202A (ja) |
KR (1) | KR101089028B1 (ja) |
CN (1) | CN101803182B (ja) |
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GB2389251B (en) * | 2002-05-31 | 2005-09-07 | Hitachi Ltd | A communication semiconductor integrated circuit, a wireless communication apparatus, and a loop gain calibration method |
KR101481507B1 (ko) | 2007-03-12 | 2015-01-13 | 엘지전자 주식회사 | 부가 제어 신호 송수신 방법 |
JP2009232425A (ja) * | 2008-03-25 | 2009-10-08 | Toshiba Corp | 送信機 |
US9264005B1 (en) * | 2012-07-06 | 2016-02-16 | Marvell International Ltd. | Techniques for efficient radio frequency power amplifier |
CN103036578B (zh) * | 2012-12-25 | 2014-11-12 | 上海贝岭股份有限公司 | 用于高速数字通信的发射端电路 |
CN105445682B (zh) * | 2014-07-25 | 2018-08-21 | 通用电气公司 | 磁共振成像装置、射频放大系统及方法 |
CN105187346B (zh) * | 2015-09-25 | 2019-03-05 | 海能达通信股份有限公司 | 发射机相位自适应调整的方法以及发射机 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6043707A (en) * | 1999-01-07 | 2000-03-28 | Motorola, Inc. | Method and apparatus for operating a radio-frequency power amplifier as a variable-class linear amplifier |
JP2002532932A (ja) * | 1998-12-07 | 2002-10-02 | エリクソン インコーポレイテッド | Rf増幅器の振幅変調から位相変調への打ち消し方法 |
JP2004007441A (ja) * | 2002-05-31 | 2004-01-08 | Renesas Technology Corp | 無線通信装置および出力電力の立上げ方法 |
US20070037530A1 (en) * | 2005-08-09 | 2007-02-15 | Freescale Semiconductor, Inc. | Configurable multi-mode modulation system and transmitter |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2135546B (en) * | 1983-02-23 | 1986-03-19 | Philips Electronic Associated | Polar loop transmitter |
GB2150378B (en) * | 1983-11-21 | 1987-06-03 | Philips Electronic Associated | Polar loop transmitter |
US6275685B1 (en) | 1998-12-10 | 2001-08-14 | Nortel Networks Limited | Linear amplifier arrangement |
WO2000072438A1 (en) | 1999-05-25 | 2000-11-30 | Nokia Networks Oy | Linearisation and modulation device |
GB2370169A (en) * | 2000-12-15 | 2002-06-19 | Nokia Mobile Phones Ltd | Radio transmitter circuits |
US7072626B2 (en) * | 2003-04-30 | 2006-07-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Polar modulation transmitter |
US7860466B2 (en) * | 2006-06-04 | 2010-12-28 | Samsung Electro-Mechanics Company, Ltd. | Systems, methods, and apparatuses for linear polar transmitters |
US7558542B2 (en) * | 2006-06-09 | 2009-07-07 | Mediatek Inc. | System and method for providing a transmitter for polar modulation and power amplifier linearization |
US7570928B2 (en) * | 2006-08-04 | 2009-08-04 | Axiom Microdevices, Inc. | System and method for low delay corrective feedback power amplifier control |
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- 2008-05-08 JP JP2010507455A patent/JP2010527202A/ja active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002532932A (ja) * | 1998-12-07 | 2002-10-02 | エリクソン インコーポレイテッド | Rf増幅器の振幅変調から位相変調への打ち消し方法 |
US6043707A (en) * | 1999-01-07 | 2000-03-28 | Motorola, Inc. | Method and apparatus for operating a radio-frequency power amplifier as a variable-class linear amplifier |
JP2004007441A (ja) * | 2002-05-31 | 2004-01-08 | Renesas Technology Corp | 無線通信装置および出力電力の立上げ方法 |
US20070037530A1 (en) * | 2005-08-09 | 2007-02-15 | Freescale Semiconductor, Inc. | Configurable multi-mode modulation system and transmitter |
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Publication number | Publication date |
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WO2008140730A1 (en) | 2008-11-20 |
KR101089028B1 (ko) | 2011-12-01 |
CN101803182A (zh) | 2010-08-11 |
JP5248651B2 (ja) | 2013-07-31 |
US7890067B2 (en) | 2011-02-15 |
EP2151047B8 (en) | 2017-10-11 |
US20080280573A1 (en) | 2008-11-13 |
EP2151047A1 (en) | 2010-02-10 |
CN101803182B (zh) | 2013-05-22 |
JP2010527202A (ja) | 2010-08-05 |
KR20100002302A (ko) | 2010-01-06 |
EP2151047B1 (en) | 2017-09-06 |
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