CA2298927C - Aparatus and method for reducing oscillator frequency pulling during am modulation - Google Patents

Aparatus and method for reducing oscillator frequency pulling during am modulation Download PDF

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Publication number
CA2298927C
CA2298927C CA002298927A CA2298927A CA2298927C CA 2298927 C CA2298927 C CA 2298927C CA 002298927 A CA002298927 A CA 002298927A CA 2298927 A CA2298927 A CA 2298927A CA 2298927 C CA2298927 C CA 2298927C
Authority
CA
Canada
Prior art keywords
frequency
vco
output
synthesizer
pulling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002298927A
Other languages
English (en)
French (fr)
Other versions
CA2298927A1 (en
Inventor
Normand T. Lemay, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Itron Inc
Original Assignee
Itron Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Itron Inc filed Critical Itron Inc
Publication of CA2298927A1 publication Critical patent/CA2298927A1/en
Application granted granted Critical
Publication of CA2298927C publication Critical patent/CA2298927C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/10—Arrangements for measuring electric power or power factor by using square-law characteristics of circuit elements, e.g. diodes, to measure power absorbed by loads of known impedance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/14—Compensating for temperature change
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/02—Details
    • H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/02—Details
    • H03C1/06—Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator
    • 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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/345—Negative-feedback-circuit arrangements with or without positive feedback using hybrid or directional couplers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/004—Control by varying the supply voltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S323/00—Electricity: power supply or regulation systems
    • Y10S323/907—Temperature compensation of semiconductor
CA002298927A 1999-02-18 2000-02-17 Aparatus and method for reducing oscillator frequency pulling during am modulation Expired - Fee Related CA2298927C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US12064199P 1999-02-18 1999-02-18
US60/120,641 1999-02-18
US09/336,912 1999-06-21
US09/336,912 US6321074B1 (en) 1999-02-18 1999-06-21 Apparatus and method for reducing oscillator frequency pulling during AM modulation

Publications (2)

Publication Number Publication Date
CA2298927A1 CA2298927A1 (en) 2000-08-18
CA2298927C true CA2298927C (en) 2006-11-14

Family

ID=31886295

Family Applications (4)

Application Number Title Priority Date Filing Date
CA002298927A Expired - Fee Related CA2298927C (en) 1999-02-18 2000-02-17 Aparatus and method for reducing oscillator frequency pulling during am modulation
CA002298928A Expired - Fee Related CA2298928C (en) 1999-02-18 2000-02-17 Linear power control loop
CA002298926A Expired - Fee Related CA2298926C (en) 1999-02-18 2000-02-17 Temperature compensated power detector
CA002298992A Expired - Fee Related CA2298992C (en) 1999-02-18 2000-02-18 Temperature compensated high performance oscillator

Family Applications After (3)

Application Number Title Priority Date Filing Date
CA002298928A Expired - Fee Related CA2298928C (en) 1999-02-18 2000-02-17 Linear power control loop
CA002298926A Expired - Fee Related CA2298926C (en) 1999-02-18 2000-02-17 Temperature compensated power detector
CA002298992A Expired - Fee Related CA2298992C (en) 1999-02-18 2000-02-18 Temperature compensated high performance oscillator

Country Status (2)

Country Link
US (4) US6321074B1 (US06417729-20020709-M00009.png)
CA (4) CA2298927C (US06417729-20020709-M00009.png)

Families Citing this family (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6200134B1 (en) 1998-01-20 2001-03-13 Kerr Corporation Apparatus and method for curing materials with radiation
JP2002208858A (ja) * 2001-01-10 2002-07-26 Matsushita Electric Ind Co Ltd 周波数シンセサイザと周波数生成方法
US6784987B2 (en) * 2001-01-19 2004-08-31 Dbm Optics, Incorporated Non-linear ranging to control linear ranging measurement device
US8385476B2 (en) 2001-04-25 2013-02-26 Texas Instruments Incorporated Digital phase locked loop
US6531860B1 (en) * 2001-06-14 2003-03-11 Qualcomm Inc. Integrated power detector with temperature compensation
CN1225082C (zh) * 2001-11-26 2005-10-26 松下电器产业株式会社 高频功率放大装置和使用它的功率放大器模块
US6657499B2 (en) * 2002-01-18 2003-12-02 Xicor, Inc. Method and circuit for controlling power amplifiers
US7248132B2 (en) * 2002-05-20 2007-07-24 Nxp B.V. Filter structure
US7182597B2 (en) 2002-08-08 2007-02-27 Kerr Corporation Curing light instrument
US6724196B1 (en) * 2002-08-28 2004-04-20 The United States Of America As Represented By The Department Of Energy Temperature controlled high voltage regulator
US6836187B2 (en) * 2002-09-23 2004-12-28 Agilent Technologies, Inc RF peak-to-peak detector with wide dynamic range
AU2003301490A1 (en) * 2002-10-15 2004-05-04 Triquint Semiconductor, Inc. Automatic-bias amplifier circuit
US20040072554A1 (en) * 2002-10-15 2004-04-15 Triquint Semiconductor, Inc. Automatic-bias amplifier circuit
US20040070454A1 (en) * 2002-10-15 2004-04-15 Triquint Semiconductor, Inc. Continuous bias circuit and method for an amplifier
FR2846166A1 (fr) * 2002-10-18 2004-04-23 St Microelectronics Sa Oscillateur controle en tension comprenant un circuit de compensation de l'effet d'entrainement en frequence
DE10250229B4 (de) * 2002-10-29 2004-08-05 Hüttinger Elektronik GmbH & Co. KG Leistungsregelung für Hochfrequenzverstärker
DE10300011B4 (de) * 2003-01-02 2004-09-16 Infineon Technologies Ag Subtrahiererschaltung und Leistungsdetektoranordnung mit der Subtrahiererschaltung
US7003274B1 (en) * 2003-03-05 2006-02-21 Cisco Systems Wireless Networking (Australia) Pty Limited Frequency synthesizer and synthesis method for generating a multiband local oscillator signal
US7480343B2 (en) * 2003-07-16 2009-01-20 Ericsson Technology Licensing Ab Transceiver architecture with reduced VCO-pulling sensitivity
US7196591B2 (en) * 2003-08-06 2007-03-27 Synergy Microwave Corporation Tunable frequency, low phase noise and low thermal drift oscillator
US7171171B1 (en) * 2003-08-15 2007-01-30 Rf Micro Devices, Inc. GaAs RF signal detection circuit with operational amplifier
US7088189B2 (en) * 2003-09-09 2006-08-08 Synergy Microwave Corporation Integrated low noise microwave wideband push-push VCO
US7292113B2 (en) * 2003-09-09 2007-11-06 Synergy Microwave Corporation Multi-octave band tunable coupled-resonator oscillator
US6990030B2 (en) * 2003-10-21 2006-01-24 Hewlett-Packard Development Company, L.P. Magnetic memory having a calibration system
JP4939228B2 (ja) * 2003-12-09 2012-05-23 シナジー マイクロウェーブ コーポレーション 熱ドリフトがユーザ指定可能な電圧制御発振器
US7262670B2 (en) * 2003-12-09 2007-08-28 Synergy Microwave Corporation Low thermal drift, tunable frequency voltage controlled oscillator
FR2865328B1 (fr) * 2004-01-16 2006-04-21 St Microelectronics Sa Circuit integre rf comprenant un synthetiseur de frequence peu sensible a l'effet d'accrochage en frequence
GB2412797A (en) * 2004-04-02 2005-10-05 Motorola Inc RF power amplifier with feedback-controlled dc supply voltage
US7747237B2 (en) * 2004-04-09 2010-06-29 Skyworks Solutions, Inc. High agility frequency synthesizer phase-locked loop
CA2563174C (en) * 2004-04-21 2009-07-21 Synergy Microwave Corporation Wideband voltage controlled oscillator employing evanescent mode coupled-resonators
CA2515982C (en) * 2004-08-16 2008-07-22 Synergy Microwave Corporation Low noise, hybrid tuned wideband voltage controlled oscillator
US7561968B2 (en) * 2004-10-13 2009-07-14 The Boeing Company Scale factor calibration and compensation for angular position resolver
JP4690835B2 (ja) * 2004-12-21 2011-06-01 ルネサスエレクトロニクス株式会社 送信機及びそれを用いた移動体通信端末
US20060219494A1 (en) * 2005-03-30 2006-10-05 Ibc-Hearthware, Inc. Unidirectional bearing assembly
US7636021B2 (en) * 2005-05-20 2009-12-22 Synergy Microwave Corporation Low noise and low phase hits tunable oscillator
US8113830B2 (en) 2005-05-27 2012-02-14 Kerr Corporation Curing light instrument
US7301404B2 (en) * 2005-07-21 2007-11-27 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for transceiver frequency synthesis
US7409192B2 (en) * 2005-07-21 2008-08-05 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for frequency synthesis in direct-conversion transmitters
CA2566283C (en) 2005-11-02 2011-10-18 Synergy Microwave Corporation User-definable, low cost, low phase hit and spectrally pure tunable oscillator
JP5568207B2 (ja) * 2005-11-15 2014-08-06 シナジー マイクロウェーブ コーポレーション ユーザ指定可能、低コスト、低ノイズであり、位相跳躍に影響されにくいマルチオクターブ帯域チューナブル発振器
GB2446338B (en) * 2005-12-09 2011-09-28 Suren Systems Ltd Piezoelectric transducer signal processing circuit
WO2007095758A1 (en) * 2006-02-24 2007-08-30 Dragonwave, Inc. Apparatus and method for detecting output power from an amplifier
TWI332749B (en) * 2006-08-14 2010-11-01 Realtek Semiconductor Corp Power amplifier circuit having a bias signal inputted into an input terminal and method thereof
US8687563B2 (en) * 2007-01-09 2014-04-01 Stmicroelectronics, Inc. Simultaneous sensing and data transmission
US8421427B2 (en) * 2007-09-07 2013-04-16 Oki Data Corporation Reference voltage generation circuit, drive circuit, light emitting diode head, and image forming apparatus
ATE516629T1 (de) * 2008-02-07 2011-07-15 Nxp Bv Verfahren zum betrieb eines empfangsschemas mehrerer streams
KR20090116035A (ko) * 2008-05-06 2009-11-11 최준수 키패드용 회전축을 이용한 다중키 버튼구조
US20090286490A1 (en) * 2008-05-19 2009-11-19 Yuan-Hung Chung Oscillator circuit, transceiver, and method for generating oscillatory signal
US8310784B2 (en) * 2008-06-18 2012-11-13 International Business Machines Corporation Tandem magnetic writer with independently addressable coils
US8913340B2 (en) 2008-06-18 2014-12-16 International Business Machines Corporation Systems and methods for writing servo patterns
CN102549880B (zh) 2009-05-07 2016-01-20 道明尼资源公司 利用高级仪表基础设施和变电站集中电压控制的电压节约
TWI482429B (zh) * 2009-07-03 2015-04-21 Chi Mei Comm Systems Inc 無線通訊裝置及其功放效率控制模組
US8681838B2 (en) 2011-03-21 2014-03-25 Blackberry Limited Electronic device with VCO pulling compensation circuit for an input baseband signal and associated methods
US8842712B2 (en) 2011-03-24 2014-09-23 Gregory C. Hancock Methods and apparatuses for reception of frequency-hopping spread spectrum radio transmissions
RU2485667C2 (ru) * 2011-06-15 2013-06-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Балтийская государственная академия рыбопромыслового флота" Двухфазный lc-генератор квадратурных гармонических колебаний
RU2517429C1 (ru) * 2013-02-07 2014-05-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" Генератор управляемый напряжением
US9553453B2 (en) 2013-03-15 2017-01-24 Dominion Resources, Inc. Management of energy demand and energy efficiency savings from voltage optimization on electric power systems using AMI-based data analysis
US9582020B2 (en) 2013-03-15 2017-02-28 Dominion Resources, Inc. Maximizing of energy delivery system compatibility with voltage optimization using AMI-based data control and analysis
US9678520B2 (en) 2013-03-15 2017-06-13 Dominion Resources, Inc. Electric power system control with planning of energy demand and energy efficiency using AMI-based data analysis
US9847639B2 (en) 2013-03-15 2017-12-19 Dominion Energy, Inc. Electric power system control with measurement of energy demand and energy efficiency
US9563218B2 (en) 2013-03-15 2017-02-07 Dominion Resources, Inc. Electric power system control with measurement of energy demand and energy efficiency using t-distributions
EP2854289B1 (en) * 2013-09-30 2016-02-24 Nxp B.V. RF power detector and detection method
US10116289B2 (en) 2014-12-09 2018-10-30 Mediatek Inc. Signal processing circuit for mitigating pulling effect and associated method
US10732656B2 (en) 2015-08-24 2020-08-04 Dominion Energy, Inc. Systems and methods for stabilizer control
US9601995B1 (en) * 2016-05-03 2017-03-21 Texas Instruments Incorporated Low power radio frequency envelope detector
CN106154200B (zh) * 2016-06-15 2023-04-07 贵州电网有限责任公司六盘水供电局 便携式gis局放高频传感器测试装置及测试方法
GB2552965B (en) * 2016-08-15 2020-07-15 Thermo Fisher Scient Bremen Gmbh Temperature-compensated rectifying component
CN110476352B (zh) * 2018-12-08 2023-06-27 深圳市汇顶科技股份有限公司 压控振荡器牵引的减轻

Family Cites Families (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853601A (en) 1954-05-03 1958-09-23 Hughes Aircraft Co Automatic gain control
US3248654A (en) 1962-05-19 1966-04-26 Honeywell Regulator Co Temperature compensated computer
US3460041A (en) 1966-11-02 1969-08-05 Hlf Corp Linear power amplifier circuit
GB1278231A (en) 1970-01-10 1972-06-21 Plessey Co Ltd Improvements in and relating to feedback control systems
JPS5038500B1 (US06417729-20020709-M00009.png) 1970-11-26 1975-12-10
US3956661A (en) * 1973-11-20 1976-05-11 Tokyo Sanyo Electric Co., Ltd. D.C. power source with temperature compensation
US3914689A (en) 1974-05-06 1975-10-21 Charles S Wright Self powering temperature compensated rectifier for measuring current
JPS5318390A (en) 1976-08-03 1978-02-20 Toshiba Corp Mos type field effect transistor circuit
JPS5643809A (en) 1979-09-19 1981-04-22 Hitachi Ltd Automatic gain controller
JPS5647131A (en) * 1979-09-27 1981-04-28 Toyo Commun Equip Co Ltd Transmitter with phase synchronization system
GB2066004B (en) 1979-12-15 1983-11-09 Racal Dana Instr Ltd Automatic gain control circuits
US4412337A (en) 1981-11-04 1983-10-25 Motorola Inc. Power amplifier and envelope correction circuitry
JPS60145713A (ja) 1984-01-10 1985-08-01 Fujitsu Ltd 自動利得制御方式
US4593256A (en) 1984-06-28 1986-06-03 Motorola, Inc. Oscillator with switched reactance resonator for wide bandwidth and serial bias connections for low power
US4570132A (en) 1984-08-29 1986-02-11 The United States Of America As Represented By The Secretary Of The Air Force Low noise multiple crystal-controlled oscillator
US4565979A (en) 1984-12-10 1986-01-21 Ford Aerospace & Communications Corporation Double dielectric resonator stabilized oscillator
FR2576472B1 (fr) 1985-01-22 1988-02-12 Alcatel Thomson Faisceaux Procede et dispositif de commande automatique de gain d'un recepteur en acces multiple a repartition temporelle
US4639690A (en) 1985-07-05 1987-01-27 Litton Systems, Inc. Tunable, dielectric-resonator-stabilized oscillator and method of tuning same
US4816774A (en) * 1988-06-03 1989-03-28 Motorola, Inc. Frequency synthesizer with spur compensation
US4970456A (en) * 1989-01-09 1990-11-13 Motorola, Inc. Temperature compensated power detector
DE69029153T2 (de) 1989-01-18 1997-06-19 Nippon Denso Co Vorrichtung zur magnetischen Detektion und Vorrichtung zur Detektion einer physikalischen Grösse, die sie verwendet
US5054116A (en) 1989-09-29 1991-10-01 Hewlett-Packard Company Feed-forward automatic level control circuit for a high-frequency source
US5055800A (en) * 1990-04-30 1991-10-08 Motorola, Inc. Fractional n/m synthesis
US5021754A (en) * 1990-07-16 1991-06-04 Motorola, Inc. Fractional-N synthesizer having modulation spur compensation
US5214393A (en) * 1990-08-20 1993-05-25 Matsushita Electric Industrial Co., Ltd. Transmission output control circuit
US5166647A (en) 1991-02-20 1992-11-24 Ael Defense Corp. Low-noise oscillator
US5128629A (en) 1991-04-22 1992-07-07 Hughes Aircraft Company Method for controlling the output power of digital cellular telephones
JPH04352528A (ja) * 1991-05-30 1992-12-07 Matsushita Electric Ind Co Ltd 高周波電力増幅装置
JP3081902B2 (ja) 1991-11-07 2000-08-28 工業技術院長 磁場検出回路
US5220273A (en) * 1992-01-02 1993-06-15 Etron Technology, Inc. Reference voltage circuit with positive temperature compensation
JP3180424B2 (ja) * 1992-03-11 2001-06-25 ソニー株式会社 出力制御回路
US5268657A (en) * 1992-07-10 1993-12-07 Hughes Aircraft Company High performance oscillator circuit with minimum frequency pulling at power on
US5345197A (en) * 1993-01-11 1994-09-06 International Business Machines Battery powered magnetic pen having oscillator with improved efficiency and low power consumption
US5604467A (en) 1993-02-11 1997-02-18 Benchmarg Microelectronics Temperature compensated current source operable to drive a current controlled oscillator
FI930632A (fi) * 1993-02-12 1994-08-13 Nokia Mobile Phones Ltd Kytkentä lähetinvahvistimen tehon säätämiseksi
US5371473A (en) 1993-09-10 1994-12-06 Hughes Aircraft Company Thermally stable ALC for pulsed output amplifier
FI97179C (fi) * 1994-06-15 1996-10-25 Nokia Mobile Phones Ltd Pulssitetun lähettimen lähtötehon säätö ja tehon verhokäyrän muotoilu
GB9423158D0 (en) * 1994-11-17 1995-01-04 At & T Global Inf Solution Radio frequency detector circuit
US5621307A (en) * 1995-07-21 1997-04-15 Harris Corporation Fast recovery temperature compensated reference source
JPH09205333A (ja) * 1996-01-24 1997-08-05 Sony Corp 電力増幅回路
US5712593A (en) * 1996-02-05 1998-01-27 Motorola, Inc. Linear power amplifier with distortion detection
US5604468A (en) * 1996-04-22 1997-02-18 Motorola, Inc. Frequency synthesizer with temperature compensation and frequency multiplication and method of providing the same
US5796309A (en) * 1996-07-02 1998-08-18 Nippondenso Co., Ltd. Temperature compensated wide dynamic range power detection circuitry for portable RF transmission terminals
FR2758024B1 (fr) * 1996-12-30 1999-01-29 Alsthom Cge Alcatel Dispositif d'alimentation d'un amplificateur de puissance pour terminal de radiocommunications mobiles
US5990712A (en) * 1997-10-03 1999-11-23 Motorola, Inc. Harmonic generator

Also Published As

Publication number Publication date
US6417729B1 (en) 2002-07-09
CA2298926A1 (en) 2000-08-18
US6373236B1 (en) 2002-04-16
US6321074B1 (en) 2001-11-20
CA2298992A1 (en) 2000-08-18
CA2298926C (en) 2002-12-31
CA2298992C (en) 2005-07-12
US6297708B1 (en) 2001-10-02
CA2298928C (en) 2003-07-29
CA2298928A1 (en) 2000-08-18
CA2298927A1 (en) 2000-08-18

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