TWI248252B - High-efficiency power modulators - Google Patents
High-efficiency power modulators Download PDFInfo
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- TWI248252B TWI248252B TW090102223A TW90102223A TWI248252B TW I248252 B TWI248252 B TW I248252B TW 090102223 A TW090102223 A TW 090102223A TW 90102223 A TW90102223 A TW 90102223A TW I248252 B TWI248252 B TW I248252B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—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
- H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
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- H—ELECTRICITY
- 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
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C5/00—Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal
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- H—ELECTRICITY
- 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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- H—ELECTRICITY
- 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
- H03F1/3282—Acting on the phase and the amplitude of the input signal
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- H—ELECTRICITY
- 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
- H03F1/3282—Acting on the phase and the amplitude of the input signal
- H03F1/3288—Acting on the phase and the amplitude of the input signal to compensate phase shift as a function of the amplitude
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/207—A hybrid coupler being used as power measuring circuit at the output of an amplifier circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- 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
- H03F2200/451—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
- H03F2200/504—Indexing scheme relating to amplifiers the supply voltage or current being continuously controlled by a controlling signal, e.g. the controlling signal of a transistor implemented as variable resistor in a supply path for, an IC-block showed amplifier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
1248252 A7 ----B7 五、發明説明(~----- 本發明之背景 1 ·本發明之範圍 本發明係關於射頻(RF)功率放大器。 2 .技藝說明 在射頻通信區域中,由於對傳輸通過量較大成長之需 求,所要之#號必須顯示高度之資料效率。一般而言,高 度資料效率信號呈現變化波轉之特性。此種波封變化信號 通常要求線性電路操作。 在傳統之無線電發射機中,調變器與功率放大器"A)乃 係分開之機能,如圖1中所示。調變器1〇1將送至發射機之 資訊輸入信號103轉換成通帶信號1〇5,通常為射頻,該信 號可有一不變之波封(平均信號功率等於峯值信號功率)或 變化之波封(平均#號功率小於峯值信號功率)。該通帶信 號105係施加於一功率放大器(ΡΑ) 1〇7,產生一足夠功率之 輸出信號109,以輻射通過所要之距離。在無線電技藝中 可瞭解者為僅支援不變波封信號之電路較之支援波封變動 信號之電路在本質上能具有較高之能量效率因為波封變動 之信號要求線性電路工作特性之故由於波封變化信號係較 普遍使用,本案乃集中於此種信號之產生。 經已廣泛認可者,線性操作與高能量效率之所要聯合目 標乃係互相排斥,即具有高能量效率之放大器並不以線性 方式操作,及相似者,以線性方式操作之放大器並不展現 南能量效率。 因為增進一線性放大器(至50%或更高)之能量效率在過 . -5 _ 本紙張尺度適用中國國家標準(CNS) Α4規格(210X297公釐) 1248252 A7 _____B7 五、發明説明(2 ) 去已證明實際上為不可能,最大之努力集中於採用一更有 效之非線性放大器及改進其線性。此等方法包括前饋線性 化’預矯正,反饋預矯正及調變器反饋。茲將此等方法簡 述於下。 在圖2所示之前饋線性化方法中,PA(功率放大器)2〇7被 首先賦予該放大器將使信號產生何種失真之特性。此等失 真之反相係由一前饋部份211在外部產生,然後與來自該 P A之輸出209相加以形成一線性化輸出信號215。此應消 除來自該P A本身之各項失真,導致改進之線性操作。 在圖3所示之預矯正方法中,pa 307又係首先被賦予該 放大器將使信號產生何種失真之特性。此等失真之反相係 由一預墙正裝置310產生,以製成一修正之通頻帶信號3〇5, 而施加於該PA之輸入。該PA應消除來自預矯正器之各項 失真’導致改進之線性操作。 在圖4所示之反饋預墙正方法中,p a復係首先賦予該放 大器將對信號產生何種失真之特性。此等失真之反相係在 外部產生,然後施加於該p A之輸入。該P A應消除來自預 矯正器之各項失真,結果導致改良之線性操作。在預矯正 中之任何誤差係在PA之輸出處感測,以信號4 12之形式反 饋及用以校正該預矯正器,用於此技術中之預矯正裝置 41(V通常稱為適應式預矯正器。 最近已開始努力將在PA四周之連續反饋放回入該調變 器’故可繼續不斷地地校正p A之誤差。圖5中,顯示者係 適應式預矯正器方法之延伸,其中該預矯正器功用乃包括 6 - 本紙張尺度適用中國國家標準(CNS) A4規格(21〇χ297公董)
裝 訂
1248252 A7 __ B7 五、發明説明(3 ) 於碉變器5 Ο Γ内。因為此係一反饋技術,反饋環路之穩定 性(包括反饋信號5 121)乃係特別重要。保持環路之穩定性 係以包括已知之非線性組件(PA)於該環路内作進一步之加 重。此外,該信號調變之許可頻帶寬係受反饋環路動態之 限制。此種技術之一範例為組合之模擬鎖定環路通用調變 器(CALL UM) ’該碉變器乃欽述於1998年8月之1998 IEEE 無線電會議錄(RAWCON) 137-140頁所發佈D. J. Jennings,, J· Ρ· McGreehani”使用VCO導出之综合之高效率射頻發射 機:CALLUM”一 文中。 LINC技術(IEEE通信學報,1974年12月通信·23號1942-5 頁中D. C. Cox之’’具有非線性組件之線性放大”)係一種放 大器方法,該方法使用多個非線性放大器組成之一 LINC放 大器607’以放大圖6中所示之一波封變化信號。其要點為 表示一適宜帶通(無線電)信號作為兩不變波封相位調變信 號之向量和。此兩個不變波封之信號係在高效率非線性放 大器中予以各別放大,所述之放大器乃各測定大小以提供 所要輸出功率峰值之一半者,然後將該兩信號組合成最後 之輸出信號(通常在一無源網路中)。此組合器在輸出信號 之數值為低時必須在内部消耗來自該兩非線性p A之輸出 功率。因此,LINC技術喪失各單獨非線性放大器之許多固 有效率。 另一放大具有同時高能量效率的波封變化信號之現用方 法為波封消除及恢復(EER),該方法係敘述於固態電路之 IEEE雜該(1998年12月第33卷2252-2258頁)發表之D. K. Su, 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公爱)
裝 訂
1248252 A7 B7 五、發明説明(4 ) W. J. McFarland所著使用波封消除及恢復以使射頻功率放 大器線性化之I C,’ 一文中。如同LINC技術,EER技術係用 於如圖7中所示緊隨調變器後之一分離放大器。EER放大 器709”必須先將來自所施加輸入信號之振幅變化解調,然 後限制該輸入信號以便在一非線性(較佳者為開關式)放大 器中放大。波封恢復係在最後輸出級中達成、在波封恢復 程序前後,常用一反饋環路以使輸出信號波封與來自輸入 信號所測得之波封更密切匹配。如同使用任何反饋控制環 路,環路動態限制可獲得之調變頻帶寬度。 仍有使操線電通仏#號以適合傳輸之功率產生而同時呈 現高度直流至射頻轉換效率之需要。又如此產生之信號品 貝必須付合常係嚴格之性能規格,例如Gsm-EDGE規格。 本發明之概述 一般而言,本發明使用極性調變技術合併功率放大器作 為-調變器之基本組件。因此能達成過去所不能之精確信 號產生(包括波封變化)與高能量效率之組合。根據本發明 一具體實例,一調變之無線電(通頻帶)信號產生器製造一 類型之高品質信號,特別包括具有變化波封之信號。信號 係以所施加直流功率轉換成輸出射頻功率中之高能量效率 產生。,結果為產品例如行動電話手機之較長電池壽命。戲 劇性增進之效率亦可使無線電發射機用之任何所需之散熱 器在尺寸上有引人注意之縮滅(1〇至1或更大),此可大為 降低成本及尺寸,此外,能使此等無線電發射機之連續操 作,可使用小型之散熱器或甚至不用任何散熱組件而僅有 -8 - 1248252 五 、發明説明(5 之工^上升。此提供高度之操作可#性及^於許多較長 宽廣頻帶寬之卜:t 發明之另一特色為可有具 需要。此更因::」5號產生而無在操作期間連續反饋之 而減低成本。 發射機電路之設計,製造及複雜性 圖式之簡單說明 中本發明可從下列說明與附圖有進一步之瞭解,在附圖 圖1為顯不一無線電發射機之標準結構之方塊圖。 圖2為顯示一已知功率放大器(PA)之前饋線性化器之方 塊圖。 时圖3為顯不用以使功率放大器線性化之傳統輸入預矯正 器之方塊圖。 圖4為顯示用以使一功率放大器線性化之已知反饋預矯 正器之方塊圖。 圖5為使用調變器反饋之一已知功率放大器之方塊圖。 圖6為使用已知LINC技術之一放大器之方塊圖。 圖7為使用已知EER放大器技術之一放大器之方塊圖。 圖8為顯示一功率放大器之三通道典型之方塊圖。 圖9為根據本發明之一具體實例之功率調變器之方塊 圖,具有Ρ Α之校準測量。 圖1 0為顯示功率調變器之一實例之更進一步詳情之方塊 圖。 圖1 1為使用正交(矩形)調變變換器之一功率調變器之方 -9 - 本紙張尺度適用中國國家摞準(CNS) A4規格(210X297公釐) 1248252 A7 B7 五、發明説明(1〇 ) 信號圖相容。此係顯示於圖1 1,及使用正校座標相等於表 1之信號圖顯示於表2代替極化信號圖,可使用一矩形信號 圖。一矩形極化變換器1126乃用以轉換結果所得之I,Q信 號至極化形式。 表2 :用於方形16 QAM之笛卡爾信號圖 符號 X y 0 0.236 0.236 1 0.236 0.707 2 0.236 0.236 3 0.236 -0.707 4 0.707 0.236 5 0.707 0.707 6 0.707 -0-236 7 0.707 -0.707 符號 X y 8 -0.236 0.236 9 -0.236 0.707 A -0.236 -0.236 B -0.236 -0.707 C -0.707 0.236 D -0.707 0.707 E -0.707 -0.236 F -0.707 -0.707 裝 訂 又可使用正交調變器於相位調變信號之生產。此係顯示 於圖1 2中。代替矩形至極化變換器,使用一矩形至數值變 換器1227以產生用於數值控制器1227之數值信號。一正交 相位調變信號產生器1229直接使用I,Q信號。使用正交相 位調變信號產生器1229時,圖1 1之直接相位校正特性不能 再用’縱使數值校正可使用數值測量裝置12 3 3及校準表 1211·實施之。由於在正交調變器中精確相位控制之困難, 以及通常不能使用正交調變器以獨立調整其輸出信號之相 -14- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)
Claims (1)
- 中文申請專利範圍替換本(94年8月)漂 A8 B8 C8 D81· 一種射頻功率調變器,包含: 一種三通道之功率放大器,具有一信號輸入,一信號 輸出及以控制方式變更之一功率供應輸入; 一調變器驅動器,響應於資訊輸入以產生施加於該三 通道功率放大器之信輸入之一輸入信號,及施加於該功 率供應輸入之一控制功率供應源; 其中該調變驅動器包含響應於資訊信號之一信號圖, 以產生至少第一及第二數值,一相位調變信號產生器響 應於此等數量之至少一數值,以產生該三通道功率放大 器之輸入信號,以及一數值控制器響應於至少此等數值 之一,以產生控制之功率供應源; 用以產生一校準因素之裝置,該校準因素是由該三通 道功率放大器之一輸出信號之至少一特性之測量所獲 得’該校準因素被施加至該調變器驅動器,以造成該輸 入信號與該可控制功率供應源中之一改變; 其中該三通道功率放大器係在硬性接通(hard-〇n)與硬 性關閉(hard-off)之兩狀態間予以驅動,而不在可感知之 時間百分比之線性工作區域中使該功率放大器操作,藉 以產生一RF輸出信號,該調變器驅動器及該校準電路是 以開路迴路方式相對於該RF輪出信號來操作。 2·如申請專利範圍第1項之功率調變器,其中該信號圖係 一極化信號圖及此等數量包括一數值量及一角度量。 3.如申請專利範圍第1項之功率調變器,其中該信號圖係 正父#號圖’另包含用以實施正交至極化轉、換之裝 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1248252 六、申請專利範圍 置,因而產生一數值量與一角度量。 4· ί申請專利範圍第1項之功率調變器,其中第一數值及 =二數值為〗及(^信號,及其中該相位調變信號產生器係 響應於I及Q信號以產生輸入信號。 5.如申請專利範圍第2項之功率調變器,另包含時間對準 裝置,用以使該數值量及角度量在互相有關之一特殊時 間對準中發生。 6·如^請專利範圍第Η之功率調變器,另包含在數值量 <信號路徑中之第一頻帶限制濾波器及在 路徑中之第二頻帶限制滤波器。 …以 7·如申請專利範圍第1項之功率調變器,包含第一及第二 :準路徑,各包括用以測量代表該三通道:率放大器: 一輸出信號相關之至少一數值之裝置。 8·:申請專利範圍第7項之功率調變器,其中該校準路徑 執仃角度校準及另一校準路徑執行數值校準。 利範圍第8項之裝置,其中用以執行角度校 準<杈準路徑包括一直接數位相位量化器。 -2- 本紙張尺度_ t g Α4_(2ι()χ297_ 1248252 年汐月23日修正射/補矣 第090102223號專利申請案 中文圖式替換頁(94年6月) S111W1-
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US09/495,891 US6366177B1 (en) | 2000-02-02 | 2000-02-02 | High-efficiency power modulators |
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US (1) | US6366177B1 (zh) |
EP (1) | EP1262018B1 (zh) |
JP (1) | JP2004501527A (zh) |
KR (1) | KR100788586B1 (zh) |
CN (2) | CN101039103A (zh) |
AT (1) | ATE387749T1 (zh) |
AU (1) | AU2001233243A1 (zh) |
DE (1) | DE60132979T2 (zh) |
TW (1) | TWI248252B (zh) |
WO (1) | WO2001058012A2 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI423045B (zh) * | 2006-02-06 | 2014-01-11 | Advantest Singapore Pte Ltd | 用以產生具有相關功率頻譜的最小化激勵信號之方法、激勵信號產生器及非暫時性電腦可讀取媒體 |
Families Citing this family (129)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6449465B1 (en) * | 1999-12-20 | 2002-09-10 | Motorola, Inc. | Method and apparatus for linear amplification of a radio frequency signal |
GB0014344D0 (en) * | 2000-06-13 | 2000-08-02 | Nokia Mobile Phones Ltd | Universal modulation mode tri-amplifier |
JP2002009557A (ja) * | 2000-06-21 | 2002-01-11 | Matsushita Electric Ind Co Ltd | 線形補償増幅装置 |
US6751265B1 (en) * | 2000-09-13 | 2004-06-15 | Tropian, Inc. | Method and system of amplitude modulation using dual/split channel unequal amplification |
US6522194B1 (en) * | 2000-12-29 | 2003-02-18 | Ericsson Inc. | Envelope restoration scheme for linear high-efficiency power amplification |
US6937668B2 (en) * | 2001-03-28 | 2005-08-30 | Spectra Wireless, Inc. | Method of and apparatus for performing modulation |
US6701138B2 (en) * | 2001-06-11 | 2004-03-02 | Rf Micro Devices, Inc. | Power amplifier control |
US6882831B2 (en) * | 2001-12-07 | 2005-04-19 | Broadcom Corporation | Translational loop transmitter architecture employing channel power ratio measurements for modulation accuracy calibration |
US6703897B2 (en) * | 2001-12-26 | 2004-03-09 | Nortel Networks Limited | Methods of optimising power amplifier efficiency and closed-loop power amplifier controllers |
US7248642B1 (en) | 2002-02-05 | 2007-07-24 | Andrew Corporation | Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks |
US7197085B1 (en) | 2002-03-08 | 2007-03-27 | Andrew Corporation | Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks |
US7266159B2 (en) | 2002-03-08 | 2007-09-04 | Andrew Corporation | Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks |
KR100727798B1 (ko) * | 2002-03-19 | 2007-06-14 | 파워웨이브 테크놀로지스, 인크. | 단일 및 다중 채널 통신 시스템들에서 신호 제로크로싱들을 제거하기 위한 시스템 및 방법 |
US6801086B1 (en) | 2002-04-03 | 2004-10-05 | Andrew Corporation | Adaptive digital pre-distortion using amplifier model that incorporates frequency-dependent non-linearities |
US7801244B2 (en) * | 2002-05-16 | 2010-09-21 | Rf Micro Devices, Inc. | Am to AM correction system for polar modulator |
US7991071B2 (en) * | 2002-05-16 | 2011-08-02 | Rf Micro Devices, Inc. | AM to PM correction system for polar modulator |
US7103337B2 (en) * | 2002-05-31 | 2006-09-05 | Hitachi, Ltd. | PLL circuit having a multi-band oscillator and compensating oscillation frequency |
GB2389275B (en) * | 2002-05-31 | 2006-10-25 | Hitachi Ltd | Apparatus for mobile communication system |
GB2389254B (en) * | 2002-05-31 | 2005-09-07 | Hitachi Ltd | Semiconductor integrated circuit device for communication |
US7139327B2 (en) * | 2002-06-10 | 2006-11-21 | Andrew Corporation | Digital pre-distortion of input signals for reducing spurious emissions in communication networks |
US6624712B1 (en) | 2002-06-11 | 2003-09-23 | Motorola, Inc. | Method and apparatus for power modulating to prevent instances of clipping |
US6624711B1 (en) | 2002-06-11 | 2003-09-23 | Motorola, Inc. | Method and apparatus for power modulating to prevent instances of clipping |
US6646501B1 (en) * | 2002-06-25 | 2003-11-11 | Nortel Networks Limited | Power amplifier configuration |
US7346122B1 (en) * | 2002-08-21 | 2008-03-18 | Weixun Cao | Direct modulation of a power amplifier with adaptive digital predistortion |
US6924699B2 (en) * | 2003-03-06 | 2005-08-02 | M/A-Com, Inc. | Apparatus, methods and articles of manufacture for digital modification in electromagnetic signal processing |
US7545865B2 (en) | 2002-12-03 | 2009-06-09 | M/A-Com, Inc. | Apparatus, methods and articles of manufacture for wideband signal processing |
US7187231B2 (en) * | 2002-12-02 | 2007-03-06 | M/A-Com, Inc. | Apparatus, methods and articles of manufacture for multiband signal processing |
US7245183B2 (en) * | 2002-11-14 | 2007-07-17 | M/A-Com Eurotec Bv | Apparatus, methods and articles of manufacture for processing an electromagnetic wave |
US7203262B2 (en) | 2003-05-13 | 2007-04-10 | M/A-Com, Inc. | Methods and apparatus for signal modification in a fractional-N phase locked loop system |
US7298854B2 (en) * | 2002-12-04 | 2007-11-20 | M/A-Com, Inc. | Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing |
US6891432B2 (en) | 2002-11-14 | 2005-05-10 | Mia-Com, Inc. | Apparatus, methods and articles of manufacture for electromagnetic processing |
US7526260B2 (en) * | 2002-11-14 | 2009-04-28 | M/A-Com Eurotec, B.V. | Apparatus, methods and articles of manufacture for linear signal modification |
CN100362746C (zh) * | 2002-10-28 | 2008-01-16 | 松下电器产业株式会社 | 发送机 |
US7260157B2 (en) | 2002-11-21 | 2007-08-21 | Sotoudeh Hamedi Hagh | Phase shifted transmitter architecture for communication systems |
US6937094B2 (en) * | 2002-11-22 | 2005-08-30 | Powerwave Technologies, Inc. | Systems and methods of dynamic bias switching for radio frequency power amplifiers |
US6765440B2 (en) * | 2002-12-18 | 2004-07-20 | Andrew Corporation | Model-based feed-forward linearization of amplifiers |
US6801082B2 (en) * | 2002-12-31 | 2004-10-05 | Motorola, Inc. | Power amplifier circuit and method using bandlimited signal component estimates |
US7555057B2 (en) * | 2003-01-17 | 2009-06-30 | Texas Instruments Incorporated | Predistortion calibration in a transceiver assembly |
US6859098B2 (en) | 2003-01-17 | 2005-02-22 | M/A-Com, Inc. | Apparatus, methods and articles of manufacture for control in an electromagnetic processor |
JP4230238B2 (ja) * | 2003-02-06 | 2009-02-25 | パナソニック株式会社 | 送信装置及びその調整方法 |
JP2005012540A (ja) * | 2003-06-19 | 2005-01-13 | Matsushita Electric Ind Co Ltd | 電力増幅装置 |
US7251293B2 (en) * | 2003-06-27 | 2007-07-31 | Andrew Corporation | Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics |
JP3844352B2 (ja) * | 2003-08-07 | 2006-11-08 | 松下電器産業株式会社 | 送信装置 |
US7091778B2 (en) | 2003-09-19 | 2006-08-15 | M/A-Com, Inc. | Adaptive wideband digital amplifier for linearly modulated signal amplification and transmission |
US7480511B2 (en) * | 2003-09-19 | 2009-01-20 | Trimble Navigation Limited | Method and system for delivering virtual reference station data |
CA2460295C (en) * | 2003-10-27 | 2009-08-04 | Vcom Inc. | Method and apparatus for digital vector qam modulator |
CA2460298C (en) * | 2003-11-28 | 2008-02-12 | Vcom Inc. | Modulation using discrete amplitude adjustment and dual digital delay lines |
CA2460299C (en) * | 2003-11-28 | 2008-02-12 | Vcom Inc. | Amplitude and phase modulation using dual digital delay vectors |
US7343138B2 (en) * | 2003-12-08 | 2008-03-11 | M/A-Com, Inc. | Compensating for load pull in electromagentic signal propagation using adaptive impedance matching |
US7116951B2 (en) * | 2003-12-16 | 2006-10-03 | Motorola, Inc. | Transmitter circuit and method for modulation distortion compensation |
US7177370B2 (en) * | 2003-12-17 | 2007-02-13 | Triquint Semiconductor, Inc. | Method and architecture for dual-mode linear and saturated power amplifier operation |
US7915954B2 (en) * | 2004-01-16 | 2011-03-29 | Qualcomm, Incorporated | Amplifier predistortion and autocalibration method and apparatus |
US7333780B2 (en) * | 2004-03-03 | 2008-02-19 | Matsushita Electric Industrial Co., Ltd. | Polar modulation transmission apparatus and radio communication apparatus |
US7363014B2 (en) | 2004-03-09 | 2008-04-22 | Matsushita Electric Industrial Co., Ltd. | Transmitting apparatus and radio communication apparatus |
JP4608487B2 (ja) * | 2004-04-27 | 2011-01-12 | パナソニック株式会社 | 増幅器、情報通信機器、及び増幅方法 |
CN100337491C (zh) * | 2004-05-10 | 2007-09-12 | 华为技术有限公司 | 自动功率控制优化方法及其系统 |
US7274748B1 (en) | 2004-06-02 | 2007-09-25 | Rf Micro Devices, Inc. | AM to FM correction system for a polar modulator |
US7551686B1 (en) | 2004-06-23 | 2009-06-23 | Rf Micro Devices, Inc. | Multiple polynomial digital predistortion |
JP4767583B2 (ja) | 2004-06-29 | 2011-09-07 | パナソニック株式会社 | 歪補償回路 |
US7109791B1 (en) | 2004-07-09 | 2006-09-19 | Rf Micro Devices, Inc. | Tailored collector voltage to minimize variation in AM to PM distortion in a power amplifier |
US7529523B1 (en) | 2004-08-23 | 2009-05-05 | Rf Micro Devices, Inc. | N-th order curve fit for power calibration in a mobile terminal |
US7359680B2 (en) * | 2004-09-14 | 2008-04-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Delay calibration in polar modulation transmitters |
US7983632B2 (en) * | 2004-09-24 | 2011-07-19 | Broadcom Corporation | Feedback control loop for amplitude modulation in a polar transmitter with a translational loop |
US7330073B2 (en) * | 2004-10-06 | 2008-02-12 | Telefonaktiebolaget L M Ericsson (Publ) | Arbitrary waveform predistortion table generation |
US7355470B2 (en) | 2006-04-24 | 2008-04-08 | Parkervision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning |
US7327803B2 (en) | 2004-10-22 | 2008-02-05 | Parkervision, Inc. | Systems and methods for vector power amplification |
JP2006135422A (ja) * | 2004-11-02 | 2006-05-25 | Matsushita Electric Ind Co Ltd | 送信回路 |
US7098754B2 (en) * | 2005-01-31 | 2006-08-29 | Rf Micro Devices, Inc. | Fractional-N offset phase locked loop |
DE102005006162B3 (de) * | 2005-02-10 | 2006-08-17 | Infineon Technologies Ag | Sende-/Empfangseinrichtung mit einem eine einstellbare Vorverzerrung aufweisenden Polar-Modulator |
JP4583967B2 (ja) | 2005-02-23 | 2010-11-17 | パナソニック株式会社 | 高周波電力増幅器及びその出力電力調整方法 |
US7474878B1 (en) | 2005-03-02 | 2009-01-06 | Rf Micro Devices, Inc. | Closed loop polar modulation system with open loop option at low power levels |
US7457586B1 (en) | 2005-03-15 | 2008-11-25 | Rf Micro Devices, Inc. | Method of in-device phase measurement and correlation to programmable factors |
JP4637850B2 (ja) * | 2005-03-22 | 2011-02-23 | パナソニック株式会社 | 送信装置、通信機器、及び移動無線機 |
US7450916B1 (en) | 2005-04-06 | 2008-11-11 | Rf Micro Devices, Inc. | Excess current and saturation detection and correction in a power amplifier |
US7977919B1 (en) | 2005-04-06 | 2011-07-12 | Rf Micro Devices, Inc. | Over-voltage protection accounting for battery droop |
JP4845574B2 (ja) * | 2005-04-26 | 2011-12-28 | パナソニック株式会社 | 極座標変調回路、集積回路および無線装置 |
DE602006005076D1 (de) * | 2005-04-27 | 2009-03-19 | Panasonic Corp | Polarmodulations-Übertragungsschaltung und Kommunikationseinrichtung |
CN101167325B (zh) * | 2005-04-27 | 2010-12-01 | 松下电器产业株式会社 | 极性调制发射机电路和通信设备 |
JP2006333450A (ja) * | 2005-04-28 | 2006-12-07 | Matsushita Electric Ind Co Ltd | 極座標変調回路、極座標変調方法、集積回路および無線送信装置 |
US7715808B2 (en) | 2005-04-28 | 2010-05-11 | Panasonic Corporation | Polar modulating circuit, polar coordinate modulating method, integrated circuit and radio transmission device |
US7412215B1 (en) | 2005-06-03 | 2008-08-12 | Rf Micro Devices, Inc. | System and method for transitioning from one PLL feedback source to another |
US7336127B2 (en) * | 2005-06-10 | 2008-02-26 | Rf Micro Devices, Inc. | Doherty amplifier configuration for a collector controlled power amplifier |
US8224265B1 (en) | 2005-06-13 | 2012-07-17 | Rf Micro Devices, Inc. | Method for optimizing AM/AM and AM/PM predistortion in a mobile terminal |
US20070018718A1 (en) * | 2005-06-20 | 2007-01-25 | National Sun Yat-Sen University | Microwave transmitter and the method for increasing envelope bandwidth |
US7382182B2 (en) * | 2005-06-29 | 2008-06-03 | Motorola, Inc. | System for reducing calibration time of a power amplifier |
DE102005032060A1 (de) * | 2005-07-08 | 2007-01-18 | Infineon Technologies Ag | Sendeanordnung, Sende-Empfänger mit der Sendeanordnung und Verfahren zur Signalverarbeitung |
US7539462B2 (en) * | 2005-08-09 | 2009-05-26 | Freescale Semiconductor, Inc. | Configurable multi-mode modulation system and transmitter |
US7474708B1 (en) | 2005-08-30 | 2009-01-06 | Rf Micro Devices, Inc. | Multimode transmitter architecture |
US7330071B1 (en) | 2005-10-19 | 2008-02-12 | Rf Micro Devices, Inc. | High efficiency radio frequency power amplifier having an extended dynamic range |
US7911272B2 (en) | 2007-06-19 | 2011-03-22 | Parkervision, Inc. | Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments |
US8334722B2 (en) | 2007-06-28 | 2012-12-18 | Parkervision, Inc. | Systems and methods of RF power transmission, modulation and amplification |
US8013675B2 (en) | 2007-06-19 | 2011-09-06 | Parkervision, Inc. | Combiner-less multiple input single output (MISO) amplification with blended control |
JP4903718B2 (ja) * | 2005-12-27 | 2012-03-28 | パナソニック株式会社 | マルチモード対応極座標変調送信装置、及び、マルチモード無線通信方法 |
JP4951238B2 (ja) | 2005-12-27 | 2012-06-13 | パナソニック株式会社 | 極座標変調送信装置及び適応歪補償処理システム並びに極座標変調送信方法及び適応歪補償処理方法 |
JP2007189438A (ja) * | 2006-01-12 | 2007-07-26 | Fujitsu Ltd | タイミング調整装置及びタイミング調整方法 |
US7877060B1 (en) * | 2006-02-06 | 2011-01-25 | Rf Micro Devices, Inc. | Fast calibration of AM/PM pre-distortion |
US7962108B1 (en) | 2006-03-29 | 2011-06-14 | Rf Micro Devices, Inc. | Adaptive AM/PM compensation |
US8031804B2 (en) | 2006-04-24 | 2011-10-04 | Parkervision, Inc. | Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion |
US7937106B2 (en) | 2006-04-24 | 2011-05-03 | ParkerVision, Inc, | Systems and methods of RF power transmission, modulation, and amplification, including architectural embodiments of same |
US8548400B2 (en) * | 2006-05-31 | 2013-10-01 | Freescale Semiconductor, Inc. | System and method for polar modulation using power amplifier bias control |
US7593698B1 (en) | 2006-07-11 | 2009-09-22 | Rf Micro Devices, Inc. | Large signal polar modulated power amplifier |
US7668249B1 (en) | 2006-07-25 | 2010-02-23 | Rf Micro Devices, Inc. | Oversampling rate converter with timing control for a digital radio frequency transmitter modulator |
US7689182B1 (en) | 2006-10-12 | 2010-03-30 | Rf Micro Devices, Inc. | Temperature compensated bias for AM/PM improvement |
US7956615B1 (en) | 2007-02-27 | 2011-06-07 | Rf Micro Devices, Inc. | Utilizing computed battery resistance as a battery-life indicator in a mobile terminal |
US7962109B1 (en) | 2007-02-27 | 2011-06-14 | Rf Micro Devices, Inc. | Excess current and saturation detection and correction in a power amplifier |
US7518461B1 (en) | 2007-02-28 | 2009-04-14 | Matsushita Electric Industrial Co., Ltd. | Method of configuring a polar-based modulator using a parameter look-up table |
WO2008107833A1 (en) * | 2007-03-07 | 2008-09-12 | Koninklijke Philips Electronics N.V. | A method to improve a linearity of a rf transfer characteristic of a modulating rf amplifier |
US8009762B1 (en) | 2007-04-17 | 2011-08-30 | Rf Micro Devices, Inc. | Method for calibrating a phase distortion compensated polar modulated radio frequency transmitter |
WO2008144017A1 (en) | 2007-05-18 | 2008-11-27 | Parkervision, Inc. | Systems and methods of rf power transmission, modulation, and amplification |
US7840193B2 (en) * | 2007-10-11 | 2010-11-23 | Panasonic Corporation | Transmitter and communication apparatus |
EP2229726B1 (en) * | 2007-12-07 | 2014-02-26 | Nxp B.V. | Transmitter comprising a pulse width pulse position modulator and method thereof |
WO2009145887A1 (en) | 2008-05-27 | 2009-12-03 | Parkervision, Inc. | Systems and methods of rf power transmission, modulation, and amplification |
JP5267389B2 (ja) * | 2009-09-01 | 2013-08-21 | 富士通株式会社 | 送信装置及び送信方法 |
US8489042B1 (en) | 2009-10-08 | 2013-07-16 | Rf Micro Devices, Inc. | Polar feedback linearization |
JP5349679B2 (ja) * | 2010-03-04 | 2013-11-20 | 三菱電機株式会社 | 送信モジュールおよびフェーズドアレイアンテナ装置 |
JP2011188123A (ja) * | 2010-03-05 | 2011-09-22 | Panasonic Corp | ポーラ変調方式を用いた送信回路及び通信機器 |
KR20130093487A (ko) * | 2010-04-09 | 2013-08-22 | 스미토모덴키고교가부시키가이샤 | 증폭 회로 및 무선 통신 장치 |
EP2673881B1 (en) | 2011-02-07 | 2019-02-06 | Skyworks Solutions, Inc. | Apparatus and methods for envelope tracking calibration |
EP2695294A1 (en) | 2011-04-08 | 2014-02-12 | Parkervision, Inc. | Systems and methods of rf power transmission, modulation, and amplification |
US8711976B2 (en) | 2011-05-12 | 2014-04-29 | Andrew Llc | Pre-distortion architecture for compensating non-linear effects |
KR20140034895A (ko) | 2011-06-02 | 2014-03-20 | 파커비전, 인크. | 안테나 제어 |
JP5731325B2 (ja) * | 2011-08-26 | 2015-06-10 | 富士通株式会社 | 変調器およびそれを用いる増幅器 |
US8744378B2 (en) | 2012-02-09 | 2014-06-03 | Texas Instruments Incorporated | LINC transmitter with improved efficiency |
US9595924B2 (en) | 2012-08-03 | 2017-03-14 | Broadcom Corporation | Calibration for power amplifier predistortion |
KR101738730B1 (ko) | 2013-04-23 | 2017-05-22 | 스카이워크스 솔루션즈, 인코포레이티드 | 전력 증폭기 시스템에서의 엔벨로프 정형화 장치 및 방법 |
US9071487B2 (en) * | 2013-08-20 | 2015-06-30 | Analog Devices Global | Power amplification system, device and method |
EP3047348A4 (en) | 2013-09-17 | 2016-09-07 | Parkervision Inc | METHOD, DEVICE AND SYSTEM FOR THE PRESENTATION OF A MEDIA TIME FUNCTION |
CN104135241A (zh) * | 2014-08-20 | 2014-11-05 | 无锡研奥电子科技有限公司 | 一种基于GaN的宽带平衡功率放大器 |
US11736320B2 (en) * | 2022-02-14 | 2023-08-22 | Ultralogic 6G, Llc | Multiplexed amplitude-phase modulation for 5G/6G noise mitigation |
Family Cites Families (69)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3777275A (en) | 1972-01-31 | 1973-12-04 | Bell Telephone Labor Inc | Linear amplification with nonlinear devices |
US3900823A (en) | 1973-03-28 | 1975-08-19 | Nathan O Sokal | Amplifying and processing apparatus for modulated carrier signals |
US3919656A (en) | 1973-04-23 | 1975-11-11 | Nathan O Sokal | High-efficiency tuned switching power amplifier |
US4178557A (en) | 1978-12-15 | 1979-12-11 | Bell Telephone Laboratories, Incorporated | Linear amplification with nonlinear devices |
JPS6110327Y2 (zh) | 1980-01-10 | 1986-04-03 | ||
US4367443A (en) | 1980-01-17 | 1983-01-04 | Motorola, Inc. | Radio frequency signal power amplifier |
GB2177273A (en) | 1985-06-26 | 1987-01-14 | Philips Electronic Associated | R f power amplifier |
US4896372A (en) | 1986-02-25 | 1990-01-23 | Varian Associates, Inc. | Pulse width modulator for AM-RF transmitter |
US4717884A (en) | 1986-04-14 | 1988-01-05 | Motorola, Inc. | High efficiency RF power amplifier |
US4831334A (en) | 1987-06-08 | 1989-05-16 | Hughes Aircraft Company | Envelope amplifier |
US4804931A (en) | 1987-12-11 | 1989-02-14 | Acrodyne Industries, Inc. | Digital amplitude modulator - transmitter |
US4881023A (en) | 1988-03-04 | 1989-11-14 | Hughes Aircraft Company | Hybrid high speed voltage regulator with reduction of miller effect |
US4972440A (en) | 1988-09-23 | 1990-11-20 | Hughes Aircraft Company | Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals |
GB8826918D0 (en) | 1988-11-17 | 1988-12-21 | Motorola Inc | Power amplifier for radio frequency signal |
CA2035455C (en) | 1989-06-30 | 1995-08-22 | Kouji Chiba | Linear transmitter |
JP2743492B2 (ja) | 1989-07-05 | 1998-04-22 | 松下電器産業株式会社 | 送信出力電力制御装置 |
US4994757A (en) | 1989-11-01 | 1991-02-19 | Motorola, Inc. | Efficiency improvement of power amplifiers |
JPH03198512A (ja) | 1989-12-27 | 1991-08-29 | Mitsubishi Electric Corp | 高周波増幅器 |
US5276912A (en) | 1990-02-06 | 1994-01-04 | Motorola, Inc. | Radio frequency power amplifier having variable output power |
US5175877A (en) | 1990-03-15 | 1992-12-29 | Magnavox Electronic Systems Company | Apparatus and method for generating an amplitude modulated rf signal |
US5126688A (en) | 1990-03-20 | 1992-06-30 | Oki Electric Co., Ltd. | Power amplifying apparatus for wireless transmitter |
US5060294A (en) | 1990-07-05 | 1991-10-22 | Motorola, Inc. | Dual mode power amplifier for radiotelephone |
WO1992011705A1 (en) | 1990-12-20 | 1992-07-09 | Motorola, Inc. | Power control circuitry for a tdma radio frequency transmitter |
JP2800500B2 (ja) | 1991-10-01 | 1998-09-21 | 松下電器産業株式会社 | バースト送信出力制御回路 |
US5187580A (en) | 1991-02-04 | 1993-02-16 | Advanced Energy Industries, Inc. | High power switch-mode radio frequency amplifier method and apparatus |
CA2089589A1 (en) | 1992-02-21 | 1993-08-22 | Takayuki Shibata | Transmission signal level control device for radio transmitter |
US5268658A (en) | 1992-06-24 | 1993-12-07 | Rockwell International Corporation | Digital amplitude modulator and method of signal combining |
US5247264A (en) | 1992-09-04 | 1993-09-21 | Broadcast Electronics, Inc. | Combining circuit for Class-E RF power amplifiers |
US5329259A (en) | 1993-02-11 | 1994-07-12 | Motorola, Inc. | Efficient amplitude/phase modulation amplifier |
US5420536A (en) | 1993-03-16 | 1995-05-30 | Victoria University Of Technology | Linearized power amplifier |
DE4313152A1 (de) | 1993-04-22 | 1994-10-27 | Sel Alcatel Ag | HF-Verstärker mit Signalpegelregelung und damit ausgestatteter Funksender |
JPH06334541A (ja) | 1993-05-25 | 1994-12-02 | Sony Corp | 無線送信機 |
FR2707127A1 (fr) | 1993-06-29 | 1995-01-06 | Philips Laboratoire Electroniq | Système de transmission numérique à prédisposition. |
US5329249A (en) | 1993-10-13 | 1994-07-12 | Pacific Monolithics, Inc. | High efficiency RF power amplifier |
US5430416A (en) | 1994-02-23 | 1995-07-04 | Motorola | Power amplifier having nested amplitude modulation controller and phase modulation controller |
FR2722350B1 (fr) * | 1994-07-08 | 1996-08-23 | Alcatel Espace | Methode de linearisation d'un amplificateur non-lineaire, circuit de linearisation et amplificateur comportant un tel circuit |
US5570062A (en) | 1994-10-12 | 1996-10-29 | Ericsson Ge Mobile Communications Inc. | AM-FM transmitter power amplifier using class-BC |
GB2296145B (en) | 1994-12-15 | 1999-09-22 | Nokia Mobile Phones Ltd | Radio transmitters and methods of operation |
US5920596A (en) | 1995-01-31 | 1999-07-06 | Motorola, Inc. | Apparatus for amplifying a signal using a digital processor |
US5697074A (en) | 1995-03-30 | 1997-12-09 | Nokia Mobile Phones Limited | Dual rate power control loop for a transmitter |
JP3522969B2 (ja) | 1995-10-25 | 2004-04-26 | パイオニア株式会社 | Btl増幅器装置 |
US5673000A (en) | 1996-01-05 | 1997-09-30 | Rockford Corporation | Dynamically invariant AB linear operation amplifier |
SE506842C2 (sv) | 1996-06-28 | 1998-02-16 | Ericsson Telefon Ab L M | Anordning och förfarande vid radiosändare för styrning av effektförstärkare |
US5705959A (en) | 1996-10-08 | 1998-01-06 | The United States Of America As Represented By The Secretary Of The Air Force | High efficiency low distortion amplification |
US5847602A (en) * | 1997-03-03 | 1998-12-08 | Hewlett-Packard Company | Method and apparatus for linearizing an efficient class D/E power amplifier using delta modulation |
US6256482B1 (en) | 1997-04-07 | 2001-07-03 | Frederick H. Raab | Power- conserving drive-modulation method for envelope-elimination-and-restoration (EER) transmitters |
US5880633A (en) | 1997-05-08 | 1999-03-09 | Motorola, Inc. | High efficiency power amplifier |
US5861777A (en) | 1997-07-02 | 1999-01-19 | Motorola, Inc. | Method and apparatus for compensation of phase distortion in power amplifiers |
US5990735A (en) | 1997-07-02 | 1999-11-23 | Motorola, Inc. | Method and apparatus for high efficiency power amplification |
US5886572A (en) | 1997-07-25 | 1999-03-23 | Motorola, Inc. | Method and apparatus for reducing distortion in a power amplifier |
US5831475A (en) | 1997-08-04 | 1998-11-03 | Motorola, Inc. | Method and apparatus for delay matching in a power amplifier |
US5955917A (en) * | 1997-08-27 | 1999-09-21 | Hughes Electronics Corporation | Nonlinear amplifier calibration system and methods |
US6049707A (en) | 1997-09-02 | 2000-04-11 | Motorola, Inc. | Broadband multicarrier amplifier system and method using envelope elimination and restoration |
US6084468A (en) | 1997-10-06 | 2000-07-04 | Motorola, Inc. | Method and apparatus for high efficiency wideband power amplification |
US6130910A (en) | 1997-11-03 | 2000-10-10 | Motorola, Inc. | Method and apparatus for high efficiency wideband power amplification |
US5936464A (en) | 1997-11-03 | 1999-08-10 | Motorola, Inc. | Method and apparatus for reducing distortion in a high efficiency power amplifier |
US6002923A (en) | 1997-11-07 | 1999-12-14 | Telefonaktiebolaget Lm Ericsson | Signal generation in a communications transmitter |
US6049703A (en) | 1997-11-28 | 2000-04-11 | Motorola, Inc. | Amplifier circuit and method for increasing linearity of the amplifier circuit |
US5942938A (en) | 1997-12-29 | 1999-08-24 | Motorola, Inc. | Method and apparatus for high efficiency power amplification |
US6141541A (en) | 1997-12-31 | 2000-10-31 | Motorola, Inc. | Method, device, phone and base station for providing envelope-following for variable envelope radio frequency signals |
US6078628A (en) | 1998-03-13 | 2000-06-20 | Conexant Systems, Inc. | Non-linear constant envelope modulator and transmit architecture |
US5929776A (en) | 1998-03-23 | 1999-07-27 | Motorola, Inc. | Low voltage transceiver |
US6107880A (en) | 1998-08-06 | 2000-08-22 | Motorola, Inc. | Method and apparatus for increasing the linearity of the phase and gain of a power amplifier circuit |
US6100756A (en) | 1998-09-21 | 2000-08-08 | Motorola, Inc. | Method and apparatus for high efficiency power amplification |
US6101224A (en) | 1998-10-07 | 2000-08-08 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for generating a linearly modulated signal using polar modulation |
US6194963B1 (en) | 1998-11-18 | 2001-02-27 | Ericsson Inc. | Circuit and method for I/Q modulation with independent, high efficiency amplitude modulation |
US6191653B1 (en) | 1998-11-18 | 2001-02-20 | Ericsson Inc. | Circuit and method for linearizing amplitude modulation in a power amplifier |
US6295442B1 (en) | 1998-12-07 | 2001-09-25 | Ericsson Inc. | Amplitude modulation to phase modulation cancellation method in an RF amplifier |
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 |
-
2000
- 2000-02-02 US US09/495,891 patent/US6366177B1/en not_active Expired - Lifetime
-
2001
- 2001-02-02 AT AT01905353T patent/ATE387749T1/de not_active IP Right Cessation
- 2001-02-02 TW TW090102223A patent/TWI248252B/zh not_active IP Right Cessation
- 2001-02-02 DE DE60132979T patent/DE60132979T2/de not_active Expired - Lifetime
- 2001-02-02 JP JP2001557163A patent/JP2004501527A/ja active Pending
- 2001-02-02 KR KR1020027009913A patent/KR100788586B1/ko active IP Right Grant
- 2001-02-02 CN CNA2007100858614A patent/CN101039103A/zh not_active Withdrawn
- 2001-02-02 CN CNB018060196A patent/CN1311624C/zh not_active Expired - Lifetime
- 2001-02-02 AU AU2001233243A patent/AU2001233243A1/en not_active Abandoned
- 2001-02-02 WO PCT/US2001/003393 patent/WO2001058012A2/en active IP Right Grant
- 2001-02-02 EP EP01905353A patent/EP1262018B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI423045B (zh) * | 2006-02-06 | 2014-01-11 | Advantest Singapore Pte Ltd | 用以產生具有相關功率頻譜的最小化激勵信號之方法、激勵信號產生器及非暫時性電腦可讀取媒體 |
Also Published As
Publication number | Publication date |
---|---|
WO2001058012A2 (en) | 2001-08-09 |
EP1262018B1 (en) | 2008-02-27 |
JP2004501527A (ja) | 2004-01-15 |
ATE387749T1 (de) | 2008-03-15 |
KR100788586B1 (ko) | 2007-12-26 |
WO2001058012A3 (en) | 2002-04-11 |
AU2001233243A1 (en) | 2001-08-14 |
EP1262018A2 (en) | 2002-12-04 |
DE60132979T2 (de) | 2009-02-12 |
KR20030009348A (ko) | 2003-01-29 |
CN101039103A (zh) | 2007-09-19 |
DE60132979D1 (zh) | 2008-04-10 |
CN1423857A (zh) | 2003-06-11 |
CN1311624C (zh) | 2007-04-18 |
US6366177B1 (en) | 2002-04-02 |
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