AU4737297A - Method and apparatus for detecting and cancelling unwanted transmitter modulation - Google Patents

Method and apparatus for detecting and cancelling unwanted transmitter modulation

Info

Publication number
AU4737297A
AU4737297A AU47372/97A AU4737297A AU4737297A AU 4737297 A AU4737297 A AU 4737297A AU 47372/97 A AU47372/97 A AU 47372/97A AU 4737297 A AU4737297 A AU 4737297A AU 4737297 A AU4737297 A AU 4737297A
Authority
AU
Australia
Prior art keywords
detecting
transmitter modulation
unwanted transmitter
cancelling unwanted
cancelling
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.)
Abandoned
Application number
AU47372/97A
Inventor
Mark A. Jones
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.)
Ericsson Inc
Original Assignee
Ericsson Inc
Ericsson GE Mobile Communications Holding 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 Ericsson Inc, Ericsson GE Mobile Communications Holding Inc filed Critical Ericsson Inc
Publication of AU4737297A publication Critical patent/AU4737297A/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • 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
    • 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
    • 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
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0433—Circuits with power amplifiers with linearisation using feedback
AU47372/97A 1996-09-26 1997-09-24 Method and apparatus for detecting and cancelling unwanted transmitter modulation Abandoned AU4737297A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US72133496A 1996-09-26 1996-09-26
US08721334 1996-09-26
PCT/US1997/016974 WO1998013943A1 (en) 1996-09-26 1997-09-24 Method and apparatus for detecting and cancelling unwanted transmitter modulation

Publications (1)

Publication Number Publication Date
AU4737297A true AU4737297A (en) 1998-04-17

Family

ID=24897553

Family Applications (1)

Application Number Title Priority Date Filing Date
AU47372/97A Abandoned AU4737297A (en) 1996-09-26 1997-09-24 Method and apparatus for detecting and cancelling unwanted transmitter modulation

Country Status (2)

Country Link
AU (1) AU4737297A (en)
WO (1) WO1998013943A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000209294A (en) * 1998-12-30 2000-07-28 Texas Instr Inc <Ti> Circuit and method for supplying amplitude phase modulating signal
DE50111959D1 (en) * 2000-03-03 2007-03-15 Siemens Ag METHOD AND TRANSMISSION FOR GENERATING A TRANSMIT SIGNAL

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831094A (en) * 1973-08-30 1974-08-20 Collins Radio Co Means to prevent coincidental phase modulation in an amplitude modulation transmitter
US4147985A (en) * 1977-07-29 1979-04-03 Rogers Noel A Low level modulation system for a radio transmitter
US5014351A (en) * 1989-06-05 1991-05-07 Motorola, Inc. Method and apparatus for reducing alternator noise
DE4316526B4 (en) * 1993-05-18 2005-11-10 Philips Intellectual Property & Standards Gmbh Transmitter with a controllable power amplifier

Also Published As

Publication number Publication date
WO1998013943A1 (en) 1998-04-02

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